Average score
Product 1: GravaStar Mercury V75 Pro
4.1
Product 2: Epomaker RT100
4.3
acoustics
Product 1: GravaStar Mercury V75 Pro
4.2

Reviewers describe the sound as clacky and generally pleasing, with one noting it is louder and more direct while others call it clean or good sounding.

Product 2: Epomaker RT100
4.5

The RT100 tends to produce a satisfying deep or pleasant sound signature when paired with non-problematic switches.

actuation consistency
Product 1: GravaStar Mercury V75 Pro
4.4

Actuation and switch behavior are consistently portrayed as precise and responsive, with stable performance, accurate registration, and rapid actuation/deactivation noted across multiple reviews.

Product 2: Epomaker RT100
2.8

One reviewer reported occasional double spaces and inconsistent actuation feel, so key triggering may not feel perfectly uniform for every user.

backlight brightness
Product 1: GravaStar Mercury V75 Pro
4.6

Brightness is strong where discussed, with reviewers calling the RGB bright and highlighting brightness controls in the web driver.

Product 2: Epomaker RT100
4.0

Lighting visibility is acceptable to good rather than extreme, with one review calling it plenty visible and another saying it is not especially strong.

battery life
Product 1: GravaStar Mercury V75 Pro
No score yet
Product 2: Epomaker RT100
3.8

Battery life is serviceable but not universally excellent; reports range from roughly 1.5-2 days with heavier use to about a week or more with lighter settings.

build quality
Product 1: GravaStar Mercury V75 Pro
4.6

Build quality is one of the keyboard's strongest areas, repeatedly described as sturdy, heavy, well-built, high quality, and aluminum-based.

Product 2: Epomaker RT100
4.5

Across multiple outlets, the RT100 is described as sturdy, premium-feeling, and well built for a plastic keyboard.

cable quality
Product 1: GravaStar Mercury V75 Pro
2.2

The included cable is a weak point in the one review that discusses it, because it is a plain rubber USB cable rather than a braided cable.

Product 2: Epomaker RT100
4.5

The included cable is often singled out as unusually premium for a bundled accessory.

compatibility
Product 1: GravaStar Mercury V75 Pro
4.0

Compatibility is generally positive for keycaps, Windows/Mac use, and select magnetic switch replacements, though switch compatibility still requires checking supported TTC and Gateron models.

Product 2: Epomaker RT100
4.6

Mac and Windows support is repeatedly confirmed, and at least one review also notes Linux usability outside the app.

connectivity
Product 1: GravaStar Mercury V75 Pro
2.2

Connectivity is limited because the keyboard is wired-only; reviewers treat the wired setup as functional but restrictive.

Product 2: Epomaker RT100
4.7

Tri-mode connectivity is one of the RT100’s most widely praised strengths, with wired, Bluetooth, and 2.4GHz support cited again and again.

customization options
Product 1: GravaStar Mercury V75 Pro
4.5

Customization is broad, especially around actuation, rapid trigger, lighting, remapping, profiles, and Hall effect features through the web-based driver.

Product 2: Epomaker RT100
4.4

Beyond switches and colorways, reviewers consistently highlight the RT100 as a highly customizable board, especially around the screen, lighting, and mapping.

desk space efficiency
Product 1: GravaStar Mercury V75 Pro
4.1

The 75% layout saves space versus full-size boards by dropping the numpad and full navigation cluster while retaining arrows and useful keys.

Product 2: Epomaker RT100
4.7

Several reviews praise the board for fitting a numpad into a footprint that stays relatively compact for the desk.

durability
Product 1: GravaStar Mercury V75 Pro
4.5

Durability evidence is positive, with reviewers pointing to heavy-duty construction, high-quality materials, and long switch lifespan claims.

Product 2: Epomaker RT100
4.8

PBT caps and sturdy construction are treated as long-term positives, with reviewers expecting the legends and caps to hold up well.

ease of switch replacement
Product 1: GravaStar Mercury V75 Pro
4.7

Switch replacement is easy where discussed, because the Hall effect switches are hot-swappable and do not require soldering.

Product 2: Epomaker RT100
4.7

Where reviewers actually changed switches, they generally found the swap process easy.

ergonomics
Product 1: GravaStar Mercury V75 Pro
4.1

Ergonomics are helped by adjustable feet or folding legs that change typing angle, though one reviewer found the feet visually unusual.

Product 2: Epomaker RT100
4.5

Comfort is helped by the compact full-size layout and adjustable angle, though wrist-rest support is not part of the package.

extra gaming features
Product 1: GravaStar Mercury V75 Pro
4.6

Extra gaming features are a major strength, with rapid trigger, SOCD/LKP, DKS, mod-tap, profile switching, and advanced Hall effect functions cited.

Product 2: Epomaker RT100
4.8

One review explicitly highlights NKRO and anti-ghosting, which strengthens the RT100’s gaming utility.

frame rigidity
Product 1: GravaStar Mercury V75 Pro
4.6

Frame rigidity is strong, with reviews emphasizing a heavy-duty aluminum or metal case, sturdy feel, and high-quality construction.

Product 2: Epomaker RT100
4.8

One reviewer specifically noted no key rattle or flex, indicating a firm overall structure.

gaming performance
Product 1: GravaStar Mercury V75 Pro
4.5

Gaming performance is consistently rated highly, with reviewers reporting smooth play, strong FPS performance, no obvious performance complaints, and fast response.

Product 2: Epomaker RT100
4.2

Gaming performance looks good for general play, but it is more convincing for casual and mixed use than for demanding twitch play with softer switches.

hot-swappable switches
Product 1: GravaStar Mercury V75 Pro
4.6

Hot-swap support is clearly present where reviewed, letting users swap compatible magnetic switches without soldering.

Product 2: Epomaker RT100
4.7

Hot-swap support is one of the most consistently praised features, with repeated mentions of broad socket compatibility.

keycap quality
Product 1: GravaStar Mercury V75 Pro
4.0

Keycap quality is mixed: several reviews praise the PBT/PC materials and durability, while Tom's Guide strongly disliked the rough paint-like texture.

Product 2: Epomaker RT100
4.4

Reviewers consistently like the thick PBT caps and profile quality, even when they differ on the taller shape.

key responsiveness
Product 1: GravaStar Mercury V75 Pro
4.5

Key responsiveness is a major strength, with reviewers describing instant key presses, feather-touch activation, ultra-fast response, and rapid registration.

Product 2: Epomaker RT100
4.8

Where directly tested, keys were described as fast and precise, with reviewers not noticing sluggish response in normal use.

key spacing
Product 1: GravaStar Mercury V75 Pro
4.3

Key spacing and navigation are mostly positive, with reviewers finding arrows and extra keys easy to locate and useful in the 75% layout.

Product 2: Epomaker RT100
4.5

Keys are generally described as well spaced and easy to navigate without feeling cramped.

key stability
Product 1: GravaStar Mercury V75 Pro
4.6

Key stability is directly praised in one review, which notes stable switches with minimal wiggle or wobble.

Product 2: Epomaker RT100
4.0

The space bar was described as firm and in line with the rest of the keycaps, suggesting solid stability on larger keys.

latency
Product 1: GravaStar Mercury V75 Pro
4.4

Latency performance is strong across gaming-focused reviews, with several noting no lag, low latency, or very fast measured results.

Product 2: Epomaker RT100
4.8

Multiple reviews report no discernible wireless lag, with the board feeling close to wired during use.

layout options
Product 1: GravaStar Mercury V75 Pro
4.1

Layout options are solid around the 75% form factor, variants, and configurations, though users wanting larger boards or numpads may still be limited.

Product 2: Epomaker RT100
4.2

One review notes an ISO option in addition to the standard layout, which adds some regional flexibility.

legend visibility
Product 1: GravaStar Mercury V75 Pro
4.4

Legend visibility is positive where discussed, with one reviewer noting the large themed legends remain very legible.

Product 2: Epomaker RT100
3.9

Legends are generally easy to read in normal lighting, though one review says the opaque caps hurt visibility in the dark.

macro customization
Product 1: GravaStar Mercury V75 Pro
3.2

Macro customization is mixed: one review says the web software can record macros, while another found no macro recording function at the time of testing.

Product 2: Epomaker RT100
4.4

Macro support is a clear strength, with several reviews confirming remapping and macro creation in software.

materials quality
Product 1: GravaStar Mercury V75 Pro
4.5

Materials quality is high, with repeated references to aluminum alloy, metal, full aluminum case construction, and sturdy high-quality materials.

Product 2: Epomaker RT100
2.9

Materials are mixed: the main board often feels solid, but the knob is repeatedly criticized for feeling cheap or plasticky.

media controls
Product 1: GravaStar Mercury V75 Pro
4.1

Media controls are present through a volume knob or lever, including mute behavior, though it is not always a traditional rolling knob.

Product 2: Epomaker RT100
4.4

Dedicated media functions are a real plus, with the knob/button setup adding useful playback control.

noise level
Product 1: GravaStar Mercury V75 Pro
4.0

Noise level leans clacky and noticeable rather than silent, but reviewers generally describe the sound as acceptable or good rather than harsh.

Product 2: Epomaker RT100
4.8

With the right switches, especially Sea Salt, the RT100 is repeatedly described as impressively quiet.

onboard memory
Product 1: GravaStar Mercury V75 Pro
4.0

Onboard profile support is only lightly evidenced, with one review mentioning onboard presets and profiles.

Product 2: Epomaker RT100
4.5

One review explicitly says remaps and macros can be stored to onboard memory.

per-key lighting control
Product 1: GravaStar Mercury V75 Pro
4.6

Lighting control is strong, with per-key RGB, backlighting, side lighting, and lighting controls noted across reviews.

Product 2: Epomaker RT100
4.5

One review explicitly confirms per-key RGB backlighting.

polling rate
Product 1: GravaStar Mercury V75 Pro
4.4

Polling rate is a high-spec strength, with multiple reviews citing or testing 8,000Hz polling, though one reviewer considered it more marketing than noticeable.

Product 2: Epomaker RT100
4.5

One reviewer said the 2.4GHz dongle matched the speed of many wired gaming keyboards, suggesting strong scan performance for its class.

portability
Product 1: GravaStar Mercury V75 Pro
2.6

Portability is a weakness because the board is heavy, wired-only, and visually or physically bulky despite its 75% layout.

Product 2: Epomaker RT100
3.8

Portability is mixed: the RT100 is not tiny, but its weight and removable screen make it manageable if you really want to move it around.

profile management
Product 1: GravaStar Mercury V75 Pro
3.9

Profile management is supported through presets and easy profile switching, though some layer behavior was described as limited or imperfect.

Product 2: Epomaker RT100
4.2

One review explicitly mentions Bluetooth support for up to three profiles, which helps multi-device use.

rapid trigger support
Product 1: GravaStar Mercury V75 Pro
4.7

Rapid trigger support is a core strength, appearing repeatedly with fine adjustment ranges and advanced Hall effect behavior.

Product 2: Epomaker RT100
2.8

The only direct mention was negative: one reviewer said rapid trigger inputs felt off the table with Sea Salt switches.

reliability
Product 1: GravaStar Mercury V75 Pro
4.2

Reliability is generally positive where discussed, with the keyboard feeling durable and a reviewer reporting no major issues, though minor double-clicking was noted as fixable.

Product 2: Epomaker RT100
4.2

One review describes the connection modes as working well, suggesting dependable everyday operation.

RGB customization
Product 1: GravaStar Mercury V75 Pro
4.5

RGB customization is extensive, with web software controls for lighting effects, colors, brightness, side lighting, and custom lighting behavior.

Product 2: Epomaker RT100
4.2

At least one review explicitly notes software-based RGB customization, reinforcing that lighting control goes beyond presets.

RGB lighting quality
Product 1: GravaStar Mercury V75 Pro
4.6

RGB lighting quality is a standout feature, with praise for underglow, side lighting, bright effects, leg lighting, and the visual glow through translucent keycaps.

Product 2: Epomaker RT100
4.5

RGB is described as vibrant and full-featured, even if it is partly hidden by the non-shine-through caps.

size and form factor
Product 1: GravaStar Mercury V75 Pro
4.0

The 75% form factor is generally practical, balancing desk space and function keys, but some users may prefer smaller travel boards or larger layouts.

Product 2: Epomaker RT100
4.4

The 95%/96% style layout is frequently framed as a smart near-full-size design that keeps the numpad while trimming bulk.

software quality
Product 1: GravaStar Mercury V75 Pro
4.2

Software quality is mostly positive because the web driver is easy and feature-rich, but some reviews mention early quirks, language issues, or missing macro support.

Product 2: Epomaker RT100
3.6

Software support is functional but mixed: it usually works and offers many features, yet multiple reviewers call it finicky, clunky, or less polished than major-brand alternatives.

sound dampening
Product 1: GravaStar Mercury V75 Pro
4.4

Sound dampening is well supported by foam layers, dampening pads, and case design that reviewers connect to a cleaner clacky sound.

Product 2: Epomaker RT100
4.7

Foam and internal dampening are repeatedly credited with cutting hollowness, pinging, and harsh resonance.

stabilizer quality
Product 1: GravaStar Mercury V75 Pro
4.5

Stabilizers are positively described in the reviews that mention them, with reduced rattling/pinging and good stabilizer sound.

Product 2: Epomaker RT100
4.2

Stabilizers are generally good out of the box, though at least one review still noticed minor ticking.

switch feel
Product 1: GravaStar Mercury V75 Pro
4.4

Switch feel is generally praised as light, smooth, stable, and pleasant, though switch choice is limited to linear Hall effect options.

Product 2: Epomaker RT100
4.5

Across switch variants, reviewers mostly describe the RT100 as smooth and enjoyable, though the Sea Salt option can feel mushy or unusually soft to some users.

switch options
Product 1: GravaStar Mercury V75 Pro
2.6

Switch options are limited, especially for stock switch choice and for users who want tactile or clicky switches rather than linear magnetic switches.

Product 2: Epomaker RT100
4.5

Reviews repeatedly note that Epomaker offers several switch choices, giving buyers good flexibility across linear, tactile, and quieter preferences.

typing comfort
Product 1: GravaStar Mercury V75 Pro
4.2

Typing comfort is decent to good: reviewers liked the light switches and daily-use feel, though some disliked keycap texture or sensitivity settings.

Product 2: Epomaker RT100
3.8

Typing comfort is positive overall, but very tall keycaps may not suit everyone equally well.

typing feel
Product 1: GravaStar Mercury V75 Pro
4.1

Typing feel is generally good or smooth, helped by light switches and sound tuning, but not every reviewer considered it great due to keycap texture or sensitivity.

Product 2: Epomaker RT100
4.2

Typing feel is generally praised as soft, satisfying, and pleasant, though one review found it only solid rather than class-leading.

value for money
Product 1: GravaStar Mercury V75 Pro
3.6

Value for money is divisive: several reviewers find the premium build and design worth it, while Tom's Guide and another reviewer argue cheaper competitors offer better value.

Product 2: Epomaker RT100
4.6

Value is a major strength, with many reviews saying the RT100 delivers unusual features and strong core performance for around the $100-$120 range.

volume control
Product 1: GravaStar Mercury V75 Pro
4.1

Volume control is useful and repeatedly noted, using a knob or lever that can adjust volume and often mute.

Product 2: Epomaker RT100
4.5

Volume adjustment is consistently described as tactile and pleasant to use.

wireless performance
Product 1: GravaStar Mercury V75 Pro
1.4

Wireless performance is a clear weakness because the keyboard has no Bluetooth or 2.4GHz wireless mode and is wired-only.

Product 2: Epomaker RT100
4.7

Wireless use is generally described as responsive and dependable enough for everyday work and gaming.