Average score
Product 1: ROG Harpe Ace Extreme
4.2
Product 2: Razer Viper V4 Pro
4.2
2.4GHz connectivity
Product 1: ROG Harpe Ace Extreme
4.8

Reviews consistently identify 2.4GHz wireless as the main performance connection, often tied to the Omni receiver or polling-rate booster. The mode is treated as the best route for high polling and gaming responsiveness.

Product 2: Razer Viper V4 Pro
4.8

Reviews reference HyperSpeed Wireless Gen-2 and the bundled low-latency dongle as key connection upgrades. This mouse is clearly designed around proprietary dongle wireless rather than casual secondary modes.

acceleration control
Product 1: ROG Harpe Ace Extreme
5.0

Sensor acceleration handling is documented through repeated 50G acceleration specifications. The reviews support strong acceleration capability, though they do not describe a separate user-facing acceleration tuning feature.

Product 2: Razer Viper V4 Pro
4.4

Reviews mention Dynamic Sensitivity and related tuning that can change how speed or acceleration behaves. That gives advanced users meaningful control over pointer response.

Accuracy and tracking precision
Product 1: ROG Harpe Ace Extreme
5.0

Tracking accuracy is one of the strongest areas: reviewers describe the sensor as accurate, precise, consistent, and difficult to disrupt across testing and gameplay.

Product 2: Razer Viper V4 Pro
4.8

Reviews consistently describe the tracking as exact, precise, and highly dependable in play. Several reviewers say shots land where intended, especially in competitive shooters.

balance and weight distribution
Product 1: ROG Harpe Ace Extreme
4.8

Balance is described positively where tested, with reviewers noting solid balance and excellent weight distribution that does not tilt when lifted.

Product 2: Razer Viper V4 Pro
4.8

Reviews describe the weight as centered, balanced, or evenly distributed. That balance is repeatedly tied to better control and a lighter-feeling experience during play.

battery life
Product 1: ROG Harpe Ace Extreme
3.6

Battery life is usable but not class-leading. Several reviews cite 70-hour 2.4GHz figures at 1,000Hz, while high polling and RGB reduce runtime substantially.

Product 2: Razer Viper V4 Pro
4.8

Battery life is a consensus strength. Most reviews repeat the same core claim of up to 180 hours at 1,000Hz and 45 hours at 8,000Hz, and several say the real-world endurance feels excellent.

Bluetooth support
Product 1: ROG Harpe Ace Extreme
4.9

Bluetooth is repeatedly confirmed as present alongside 2.4GHz and wired modes. Reviewers treat it as a convenience mode rather than the main gaming connection.

Product 2: Razer Viper V4 Pro
1.0

Reviews explicitly say Bluetooth is absent. The Viper V4 Pro prioritizes its gaming-focused dongle wireless setup instead.

build quality
Product 1: ROG Harpe Ace Extreme
4.6

Build quality is a major strength in most reviews, especially the stiff carbon-fiber top shell, tight buttons, and lack of creaking or flex. A few critiques focus on the nylon/plastic lower section rather than structural weakness.

Product 2: Razer Viper V4 Pro
4.9

Build quality is one of the strongest consensus wins in the review set. Reviewers repeatedly praise rigidity, lack of creak, and confidence-inspiring construction.

button customization
Product 1: ROG Harpe Ace Extreme
4.5

Button and performance customization are well supported through Armoury Crate Gear, Armoury Crate, and hardware controls. Reviewers cite remapping, DPI, polling, lift-off, lighting, and related adjustments.

Product 2: Razer Viper V4 Pro
4.6

Synapse and Synapse Web are repeatedly cited for remapping and control over the available buttons. Reviewers present customization as thorough rather than bare-bones.

button responsiveness
Product 1: ROG Harpe Ace Extreme
4.9

Button responsiveness is generally strong, with many reviews praising precise, brisk, instant, or consistent actuation. One review reports a left-click pre-travel defect, so the evidence is strong but not perfectly uniform.

Product 2: Razer Viper V4 Pro
4.8

Button presses are consistently described as responsive, fast, and precise. Multiple reviewers also note that the mouse avoids misclick or laggy-feeling input.

cable flexibility
Product 1: ROG Harpe Ace Extreme
4.0

Cable impressions are mixed. Several reviews call the paracord-style cable flexible or lightweight, while others say it is stiff or not especially good.

Product 2: Razer Viper V4 Pro
2.4

The included cable is serviceable for charging, but at least one review directly criticizes the wired experience. Cable feel is not treated as a strength of the package.

charging convenience
Product 1: ROG Harpe Ace Extreme
3.9

Charging is handled through USB-C and wired operation. Reviews describe it as functional and convenient enough, though wired mode can have polling-rate limits depending on setup.

Product 2: Razer Viper V4 Pro
3.6

Charging convenience is mixed. The strong battery life means charging is infrequent, but charging remains cable-only and lacks the ease of a docked solution.

claw grip comfort
Product 1: ROG Harpe Ace Extreme
4.0

Claw grip support is broadly positive, especially for medium to large hands. Several reviewers identify claw as a natural fit, though smaller hands may find the mouse long or awkward.

Product 2: Razer Viper V4 Pro
4.6

Claw grip is one of the clearest fit strengths in the reviews. Multiple outlets directly recommend the shape for claw users.

click latency
Product 1: ROG Harpe Ace Extreme
5.0

Click latency is presented as very low, helped by optical switches and high polling modes. Measurements and subjective comments support fast response, with little reason to worry about delay.

Product 2: Razer Viper V4 Pro
4.9

One review explicitly cites a 0.204 ms average click latency. That supports the V4 Pro’s positioning as a very fast competitive mouse.

click noise
Product 1: ROG Harpe Ace Extreme
3.1

Click noise is mixed. Some reviewers find the clicks pleasant or not annoying, while others describe the switches or side buttons as loud.

Product 2: Razer Viper V4 Pro
3.2

The main clicks are often described as loud, pingy, hollow, or more resonant than muted. This is one of the most common caveats in otherwise positive reviews.

connection stability
Product 1: ROG Harpe Ace Extreme
4.3

Connection stability is mostly praised through stable wireless and strong receiver performance, but one review reports wireless disconnects during gameplay, making this a generally strong but not flawless area.

Product 2: Razer Viper V4 Pro
4.9

The new dongle and antenna design are repeatedly tied to stable, reliable connections. Reviewers describe the link as solid and dependable in real use.

debounce customization
Product 1: ROG Harpe Ace Extreme
3.0

Debounce support is mixed in a narrow way: optical switches allow very low debounce behavior, but multiple reviews note no user-adjustable debounce setting.

Product 2: Razer Viper V4 Pro
No score yet
dock compatibility
Product 1: ROG Harpe Ace Extreme
No score yet
Product 2: Razer Viper V4 Pro
1.5

Reviews explicitly note the absence of a dock or dock compatibility. That omission stands out because the rest of the mouse is positioned as a premium flagship.

DPI range
Product 1: ROG Harpe Ace Extreme
4.9

The DPI/CPI ceiling is repeatedly cited at 42,000, with several reviews also discussing fine adjustment steps. The range is clearly flagship-level.

Product 2: Razer Viper V4 Pro
4.9

One review highlights the 50,000 DPI ceiling as a meaningful expansion of the usable adjustment range. Even when reviewers did not need that maximum, they saw the headroom as a clear spec upgrade.

durability over time
Product 1: ROG Harpe Ace Extreme
5.0

Durability evidence centers on structural integrity, carbon-fiber strength, and 100-million-click optical switches. Long-term field wear is not deeply tested, but the stated and observed durability signals are strong.

Product 2: Razer Viper V4 Pro
4.6

One review explicitly describes the V4 Pro as lighter and more durable than before. That supports the idea that the refinement is not just about speed, but also long-term robustness.

ecosystem integration
Product 1: ROG Harpe Ace Extreme
4.0

Ecosystem integration appears through the Omni receiver, shared ASUS dongle support, Armoury software, and ROG peripherals. Reviewers mention the benefit, though some question how many users will need it.

Product 2: Razer Viper V4 Pro
No score yet
ergonomic design
Product 1: ROG Harpe Ace Extreme
4.0

Ergonomics are shape-dependent. The mouse is often comfortable for larger hands and safe grip styles, but some reviewers find the hump, length, or button height awkward.

Product 2: Razer Viper V4 Pro
3.8

The ergonomics are acceptable for a competitive symmetrical mouse, but not a headline strength. Reviews often contrast it with more sculpted ergonomic alternatives.

fingertip grip comfort
Product 1: ROG Harpe Ace Extreme
3.9

Fingertip comfort is supported for some hands, but not universally. Larger hands or certain grip styles fare better; smaller-hand reviewers sometimes find the mouse too long.

Product 2: Razer Viper V4 Pro
4.6

Fingertip grip is also highlighted as a good match for the Viper V4 Pro’s low-profile symmetrical design. Reviews regularly list fingertip among the preferred grip styles.

firmware reliability
Product 1: ROG Harpe Ace Extreme
3.0

Firmware reliability is mixed because at least one reviewer received updates quickly but also saw sporadic 8K wireless shutoff behavior. The evidence points to active support with some remaining rough edges.

Product 2: Razer Viper V4 Pro
No score yet
FPS gaming suitability
Product 1: ROG Harpe Ace Extreme
4.8

FPS suitability is strong. Reviews repeatedly position the mouse around fast shooters, esports, low weight, fast inputs, and accurate tracking.

Product 2: Razer Viper V4 Pro
4.8

This is consistently framed as an elite FPS or competitive shooter mouse. Reviews repeatedly connect its shape, low weight, sensor, and latency profile to high-level shooter play.

glide smoothness
Product 1: ROG Harpe Ace Extreme
4.5

Glide is a clear strength. PTFE and glass feet are described as smooth, fast, and low-friction, although glass feet may require adjustment.

Product 2: Razer Viper V4 Pro
4.8

Feet and skates are repeatedly praised for smooth glide and easy fast movement. Several reviews connect the glide quality to the mouse’s competitive feel.

grip texture
Product 1: ROG Harpe Ace Extreme
3.8

Grip texture is mixed. Carbon fiber is often grippy or secure, but the nylon/plastic sides can feel slippery to some reviewers, making included grip tape useful.

Product 2: Razer Viper V4 Pro
4.7

The shell texture or coating is repeatedly praised for helping grip without feeling slippery. Matte and coated finishes are a recurring positive in day-to-day use.

handedness options
Product 1: ROG Harpe Ace Extreme
3.5

The shape is symmetrical, but handedness is limited by side-button placement. Reviews support basic ambidextrous hand feel while noting practical right-hand bias.

Product 2: Razer Viper V4 Pro
2.0

Multiple reviews stress that this is effectively a right-handed mouse because the side buttons sit on the left side only. Left-handed flexibility is limited.

left and right click quality
Product 1: ROG Harpe Ace Extreme
4.1

Left and right click quality receives strong praise in many reviews for tightness, tactility, and minimal wobble. A few units or reviewers report pre-travel, squishiness, or a defect, so results are not unanimous.

Product 2: Razer Viper V4 Pro
4.6

Primary clicks are commonly praised for being sharp, tactile, and consistent across the button surface. The consensus is stronger on feel than on sound.

lift-off distance
Product 1: ROG Harpe Ace Extreme
4.2

Lift-off distance is well covered through software and hardware controls. Reviews mention LOD adjustment, low/high settings, and surface calibration.

Product 2: Razer Viper V4 Pro
4.5

Lift-off controls and behavior are discussed directly in multiple reviews. Most describe the feature set or results positively, though one reviewer still wanted a lower default lift-off distance.

long-session comfort
Product 1: ROG Harpe Ace Extreme
3.8

Long-session comfort depends on hand size and grip. Some reviews mention prolonged comfort, while others cite fatigue, palm irritation, or awkward shape details.

Product 2: Razer Viper V4 Pro
4.7

Low weight and balanced construction help reduce fatigue over long sessions. Multiple reviewers directly connect comfort over time to the mouse’s light, well-distributed design.

macro support
Product 1: ROG Harpe Ace Extreme
No score yet
Product 2: Razer Viper V4 Pro
4.6

One review explicitly says Synapse is where users create macros. Macro support exists, but it is not a major focus of most reviews.

materials quality
Product 1: ROG Harpe Ace Extreme
4.9

Materials quality is one of the defining strengths. Reviews repeatedly highlight the carbon-fiber shell, premium construction, and stronger/lighter material story.

Product 2: Razer Viper V4 Pro
4.9

Material quality is described as sturdy, dense, and notably premium for such a light mouse. Reviews reject the idea that the shell feels cheap just because it is ultralight.

motion consistency
Product 1: ROG Harpe Ace Extreme
4.5

Motion consistency is supported by consistent sensor tracking, Motion Sync, stable polling, and smooth wireless behavior. One source notes Motion Sync is not user-configurable.

Product 2: Razer Viper V4 Pro
4.6

Movement is described as smooth and more fluid, especially when the mouse is tuned well. Reviews connect that smoothness to tracking quality and high polling support.

onboard memory
Product 1: ROG Harpe Ace Extreme
5.0

Onboard memory is supported by reviews noting saved profiles and the ability to configure settings once, then use the mouse without keeping software open.

Product 2: Razer Viper V4 Pro
4.5

One review explicitly mentions onboard profiles that can be adjusted in the browser. That suggests the mouse can hold profile data beyond a purely temporary software session.

palm grip comfort
Product 1: ROG Harpe Ace Extreme
3.4

Palm grip comfort is mixed. Some larger-hand reviewers can palm or relaxed-palm it, while others say the mouse is short, irritating, or less suitable for palm use.

Product 2: Razer Viper V4 Pro
4.1

Palm grip support is workable but not universal. Several reviewers were comfortable with it, while others preferred a more ergonomic shape or wanted more thumb-side contour.

polling rate
Product 1: ROG Harpe Ace Extreme
4.8

Polling-rate support is a standout feature, with repeated 8,000Hz references over wireless and, in some reviews, wired mode with the booster. Higher polling trades off heavily with battery life.

Product 2: Razer Viper V4 Pro
4.8

True 8,000Hz polling is a recurring selling point across the reviews. Several reviewers say the higher polling rate improves smoothness or responsiveness, even if some note the benefit is strongest for competitive play.

portability
Product 1: ROG Harpe Ace Extreme
4.6

Portability is strong because many reviews mention the carrying case, travel case, or accessory storage. The missing onboard dongle slot is offset by the included case.

Product 2: Razer Viper V4 Pro
3.0

Portability is not a major strength. One review specifically says the dongle-and-cable setup is less convenient for travel than a simpler all-in-one wireless approach.

premium feel
Product 1: ROG Harpe Ace Extreme
4.7

Premium feel is strong in packaging, carbon fiber, accessories, and presentation. Some reviewers still feel the price makes the premium treatment hard to justify.

Product 2: Razer Viper V4 Pro
4.7

Several reviews say the mouse feels distinctly premium in hand. That impression comes from the coating, shell rigidity, and overall finish rather than flashy extras.

profile switching
Product 1: ROG Harpe Ace Extreme
5.0

Profile switching is supported through onboard profiles and hardware combinations. Reviews cite up to five stored profiles and mouse-based profile changes.

Product 2: Razer Viper V4 Pro
No score yet
programmable buttons
Product 1: ROG Harpe Ace Extreme
3.7

Programmable controls are supported, but quantity is modest. Reviewers cite five to seven programmable inputs depending on whether scroll directions are counted.

Product 2: Razer Viper V4 Pro
4.5

Reviews confirm that the side buttons can be programmed. The mouse stays minimal on button count, but the available buttons are still treated as configurable.

RGB features
Product 1: ROG Harpe Ace Extreme
3.4

RGB is limited to the scroll wheel. Reviews confirm lighting is present and configurable, but repeatedly frame it as basic or restrained rather than elaborate.

Product 2: Razer Viper V4 Pro
1.8

The lack of RGB is mentioned again and again as part of the Viper V4 Pro’s stripped-down competitive focus. Reviews frame this as a deliberate trade-off for lower weight and better battery life.

scroll wheel quality
Product 1: ROG Harpe Ace Extreme
4.2

Scroll wheel quality is mixed-to-good. Several reviews praise defined steps and tactility, while others find it stiff, small, recessed, or unremarkable.

Product 2: Razer Viper V4 Pro
4.6

The optical scroll wheel is one of the mouse’s strongest recurring positives. Reviews praise its accuracy, defined steps, and consistency, although one review found the detents too soft for precise selection.

sensor performance
Product 1: ROG Harpe Ace Extreme
5.0

Sensor performance is consistently excellent. Reviews cite the AimPoint Pro/PAW3950-class sensor, high DPI, accuracy, responsiveness, and reliable performance.

Product 2: Razer Viper V4 Pro
4.8

The Focus Pro 50K Gen-3 sensor is repeatedly described as accurate, fast, and technically impressive. Reviews frame it as one of the mouse’s core performance upgrades.

shape comfort
Product 1: ROG Harpe Ace Extreme
3.7

Shape comfort is divisive. The safe symmetrical shape works for many, especially larger hands, but multiple reviewers find it too long, awkward, or not ideal for their grip.

Product 2: Razer Viper V4 Pro
4.6

The safe symmetrical shell is widely described as comfortable and easy to adapt to. Even reviews with ergonomic reservations still treat the shape as broadly successful.

side button quality
Product 1: ROG Harpe Ace Extreme
3.9

Side button quality is one of the most divided areas. Some reviews praise tactility and implementation, while others find the buttons too small, too far forward, loud, or less accessible.

Product 2: Razer Viper V4 Pro
4.4

Side buttons are generally seen as easy to reach and unusually good for a lightweight competitive mouse. Several reviews specifically praise their tactility or usability.

skate durability
Product 1: ROG Harpe Ace Extreme
2.5

Skate durability evidence is limited and cautious. One review warns glass feet can wear quickly, so smoothness is clearer than long-term skate durability.

Product 2: Razer Viper V4 Pro
No score yet
software stability
Product 1: ROG Harpe Ace Extreme
2.4

Software stability is inconsistent. Reviewers appreciate lighter Armoury Crate Gear, but report pop-ups, installation confusion, download problems, and troubleshooting.

Product 2: Razer Viper V4 Pro
3.9

Software behavior is mostly positive, but not flawless. Reviews praise the new web approach while also mentioning older Synapse heaviness or a web app conflict in one case.

software usability
Product 1: ROG Harpe Ace Extreme
3.2

Software usability is mixed. The lighter Gear app is simpler and useful, but several reviewers still call the software overkill, annoying, complicated, or frustrating.

Product 2: Razer Viper V4 Pro
4.6

Synapse Web is widely seen as a meaningful usability improvement because it makes tuning easier without a heavy install. Across the reviews, software control is generally presented as easy and full-featured.

surface compatibility
Product 1: ROG Harpe Ace Extreme
5.0

Surface compatibility is strong, with reviews citing hard, soft, glass, cloth, wood, and calibration support. The sensor is repeatedly described as reliable across surfaces.

Product 2: Razer Viper V4 Pro
4.8

Reviews mention reliable tracking and lift-off behavior across different surfaces. Surface handling is treated as dependable rather than finicky.

switch durability
Product 1: ROG Harpe Ace Extreme
5.0

Switch durability is strongly supported by repeated 100-million-click optical switch ratings. This is one of the clearest durability claims in the reviews.

Product 2: Razer Viper V4 Pro
4.8

Multiple reviews cite the 100 million click rating and treat the switches as built for long competitive use. Durability is framed as a real upgrade, not a throwaway spec.

switch feel
Product 1: ROG Harpe Ace Extreme
4.2

Switch feel is generally strong, with reviewers praising tactile, crisp, clicky, and consistent feedback. A minority find the clicks heavier, squishier, or not best-in-class.

Product 2: Razer Viper V4 Pro
4.7

The Gen-4 optical switches are usually described as tactile, crisp, lighter to actuate, and responsive. Even reviewers who questioned the sound still tended to praise the core feel.

value for money
Product 1: ROG Harpe Ace Extreme
2.2

Value for money is the largest weakness. Nearly every review treats the mouse as expensive or niche, with some calling it hard to justify despite strong performance.

Product 2: Razer Viper V4 Pro
3.5

Reviewers agree the V4 Pro performs at a premium level, but many still flag the price as hard to justify for non-competitive users. Value is strongest for buyers who specifically want top-tier lightweight FPS performance.

weight
Product 1: ROG Harpe Ace Extreme
4.9

Weight is a core strength. Reviews repeatedly cite 46-48g figures and emphasize the sub-50g feel, especially for a non-perforated carbon-fiber mouse.

Product 2: Razer Viper V4 Pro
4.8

Nearly every review treats the 49 to 50 gram weight as a defining advantage. The mouse is repeatedly described as feather-light, easy to move, and faster-feeling in hand.

wireless latency
Product 1: ROG Harpe Ace Extreme
4.7

Wireless latency is generally praised as very low through high polling, optical switches, and solid receiver performance. Some reviewers caution that 8K benefits are small.

Product 2: Razer Viper V4 Pro
4.9

Several reviews call out very low latency figures or noticeably crisp wireless response. The low-latency wireless link is a major part of the product’s competitive positioning.

wireless performance
Product 1: ROG Harpe Ace Extreme
4.6

Wireless performance is broadly strong, with praise for stable, responsive 2.4GHz operation and high polling. One review reports disconnects, but most evidence is positive.

Product 2: Razer Viper V4 Pro
4.8

Wireless performance is broadly praised as fast, responsive, and confidence-inspiring. Reviewers often say it feels fully competitive with wired expectations.