Average score
Product 1: Logitech G515 Rapid
3.9
Product 2: Logitech G915 X Lightspeed
4.0
acoustics
Product 1: Logitech G515 Rapid
4.5

Reviewers describe the keyboard as quieter than clicky boards, with a short, refined sound rather than a loud clatter.

Product 2: Logitech G915 X Lightspeed
3.7

Sound is noticeable rather than muted overall: some reviews like the intentional clack and muted tactile note, while others mention rattling and metallic ping.

actuation consistency
Product 1: Logitech G515 Rapid
4.3

The adjustable actuation and release tuning is repeatedly framed as useful for dialing in consistent response, whether the goal is speed or fewer accidental inputs.

Product 2: Logitech G915 X Lightspeed
4.1

Reviews describe quick, consistent registration, but the light actuation can also cause accidental double presses until the user adapts.

analog input support
Product 1: Logitech G515 Rapid
4.5

The magnetic analog switches are described as reading input across their travel, giving the board true analog-style depth awareness rather than a single fixed trigger point.

Product 2: Logitech G915 X Lightspeed
1.1

Reviews explicitly note that analog input is absent, and some compare the board unfavorably with analog-equipped rivals.

backlight brightness
Product 1: Logitech G515 Rapid
4.0

Backlighting is described as strong on the main keys, with bold, bright illumination in normal use.

Product 2: Logitech G915 X Lightspeed
4.6

Backlight brightness is easy to adjust from the keyboard, with multiple levels and the option to turn lighting off completely.

battery life
Product 1: Logitech G515 Rapid
No score yet
Product 2: Logitech G915 X Lightspeed
4.6

Battery life is one of the clearest strengths, with repeated reports of mid-30s to around 100 hours with lighting on and up to 800 to 1000 hours with lighting off.

build quality
Product 1: Logitech G515 Rapid
4.5

Across reviews, the chassis is consistently described as sturdy, well-built, dense, and rock solid for a slim keyboard.

Product 2: Logitech G915 X Lightspeed
4.8

Reviewers consistently frame the board as premium, polished, sturdy, and exceptionally well built.

cable quality
Product 1: Logitech G515 Rapid
No score yet
Product 2: Logitech G915 X Lightspeed
4.4

The included cable is described as long enough for flexible setup and not cheap or flimsy.

compatibility
Product 1: Logitech G515 Rapid
4.0

One review explicitly lists support for Windows 10/11 PCs and macOS 12 or later.

Product 2: Logitech G915 X Lightspeed
4.2

Evidence shows the keyboard working across Windows, Mac, tablets, and secondary devices, though Bluetooth device switching is not always as flexible as some rivals.

connectivity
Product 1: Logitech G515 Rapid
2.5

The G515 Rapid TKL is consistently described as wired-only, which helps performance but limits versatility versus wireless alternatives.

Product 2: Logitech G915 X Lightspeed
4.7

Tri-mode connectivity is a major strength, with wired, Bluetooth, and Lightspeed support repeatedly praised for easy switching.

customization options
Product 1: Logitech G515 Rapid
4.5

Customization is one of the keyboard's headline strengths, with repeated praise for per-key actuation tuning, remapping, multi-action inputs, and broader key personalization.

Product 2: Logitech G915 X Lightspeed
4.8

Customization depth stands out thanks to extensive remapping, layered functions, and broad software control over keys and actions.

desk space efficiency
Product 1: Logitech G515 Rapid
4.5

The tenkeyless low-profile design is repeatedly credited with saving desk space and leaving more room for mouse movement.

Product 2: Logitech G915 X Lightspeed
3.7

Space efficiency depends on version: TKL coverage highlights a compact footprint, while full-size use takes noticeably more desk room.

durability
Product 1: Logitech G515 Rapid
4.3

Durability is a positive theme, with reviewers pointing to durable switch tech, long-lasting keycaps, and a sturdy overall build.

Product 2: Logitech G915 X Lightspeed
4.7

Durability evidence is positive, with one review reporting the board still worked after water exposure and others emphasizing wear-resistant PBT caps.

ease of switch replacement
Product 1: Logitech G515 Rapid
No score yet
Product 2: Logitech G915 X Lightspeed
1.3

Switch replacement is a weak point because the switches are soldered, and one reviewer describes out-of-warranty replacement as major surgery.

ergonomics
Product 1: Logitech G515 Rapid
4.3

The low-profile shape and adjustable feet are described as comfortable to use and easier on the wrists over longer sessions.

Product 2: Logitech G915 X Lightspeed
4.4

The low-profile design and light actuation help comfort and speed for many users, although angle and layout are not ideal for everyone.

extra gaming features
Product 1: Logitech G515 Rapid
4.5

Competitive-focused extras such as key priority, SOCD-style behavior, game mode, and other advanced gaming functions are repeatedly highlighted.

Product 2: Logitech G915 X Lightspeed
4.7

Game mode and dedicated extra keys add useful gaming-specific control, especially for locking keys and assigning shortcuts.

frame rigidity
Product 1: Logitech G515 Rapid
4.5

A steel top plate and low-flex construction give the board strong rigidity despite its slim profile.

Product 2: Logitech G915 X Lightspeed
4.8

The chassis is repeatedly described as rigid and stable, with little to no flex in normal use.

gaming performance
Product 1: Logitech G515 Rapid
4.7

Gaming performance is the product's clearest strength, with reviewers repeatedly calling it fast, precise, and especially good for competitive play.

Product 2: Logitech G915 X Lightspeed
4.6

Gaming performance is consistently strong, with responsive inputs and no meaningful lag called out in actual play.

hot-swappable switches
Product 1: Logitech G515 Rapid
No score yet
Product 2: Logitech G915 X Lightspeed
1.0

Multiple reviews explicitly say the switches are not hot-swappable.

keycap quality
Product 1: Logitech G515 Rapid
4.5

The keycaps are repeatedly described as premium-feeling PBT caps with good texture and better long-term quality than cheaper alternatives.

Product 2: Logitech G915 X Lightspeed
4.4

Double-shot PBT keycaps are broadly viewed as an upgrade for durability and texture, even if not every reviewer loves the feel.

key responsiveness
Product 1: Logitech G515 Rapid
4.5

Reviewers consistently describe the keys as quick to react, precise in motion, and strong for fast gaming inputs.

Product 2: Logitech G915 X Lightspeed
4.5

The keys are widely described as snappy, responsive, and quick to register.

key spacing
Product 1: Logitech G515 Rapid
3.3

Key spacing gets mixed commentary: some reviewers say the layout does not feel cramped, while others note the tighter spacing can cause occasional missteps.

Product 2: Logitech G915 X Lightspeed
4.5

The roomier spacing on some versions is called helpful for shortcuts and finger placement.

key stability
Product 1: Logitech G515 Rapid
3.0

Key stability is mostly good, but one reviewer specifically noted minor wobble on some caps during rapid presses.

Product 2: Logitech G915 X Lightspeed
4.2

Key stability looks improved overall, though one review still notices a minor wobble.

latency
Product 1: Logitech G515 Rapid
5.0

One review explicitly frames the wired connection as delivering zero latency, no interference, and no input drops.

Product 2: Logitech G915 X Lightspeed
4.8

Wireless latency is repeatedly described as very low and close to wired behavior.

layout options
Product 1: Logitech G515 Rapid
No score yet
Product 2: Logitech G915 X Lightspeed
4.7

Review coverage confirms both full-size and TKL layout options in the lineup.

legend visibility
Product 1: Logitech G515 Rapid
2.5

Legend visibility is mixed to poor on some keys, with repeated notes about uneven illumination on larger legends and limited local-language backlighting.

Product 2: Logitech G915 X Lightspeed
3.5

Legend visibility is good with lighting on, but some reviews say readability drops when RGB is off or coverage is uneven on certain keys.

macro customization
Product 1: Logitech G515 Rapid
4.5

Macro and multi-step input support is a clear feature, with reviews mentioning recorded macros, personalized macros, and dynamic or multi-action key behavior.

Product 2: Logitech G915 X Lightspeed
4.8

Macro support is a real strength, with dedicated G keys, KEYCONTROL, direct recording, and layered assignment options.

materials quality
Product 1: Logitech G515 Rapid
4.2

Materials quality is generally strong thanks to the steel plate and PBT caps, though one review notes the broader package still feels more plastic than some rivals.

Product 2: Logitech G915 X Lightspeed
4.8

Brushed aluminum and upgraded PBT caps are repeatedly highlighted as premium material choices.

media controls
Product 1: Logitech G515 Rapid
1.9

Dedicated media controls are a common omission across reviews, with multiple writers calling out the lack of easy-access playback controls.

Product 2: Logitech G915 X Lightspeed
4.8

Dedicated media controls are consistently useful and well executed.

noise level
Product 1: Logitech G515 Rapid
4.5

Noise output is a strength: the board is repeatedly described as quiet, reduced in audible feedback, and free of unwanted echo.

Product 2: Logitech G915 X Lightspeed
3.4

Noise varies by switch and preference, ranging from office-manageable to quite loud during heavy typing.

onboard memory
Product 1: Logitech G515 Rapid
3.5

Onboard profiles are available, but at least one reviewer notes that accessing and saving them is less direct than it should be.

Product 2: Logitech G915 X Lightspeed
3.8

Some settings and profiles can be stored on the device, but richer behavior and complex macros still depend heavily on software.

per-key lighting control
Product 1: Logitech G515 Rapid
4.5

Per-key lighting control is supported, with reviewers specifically mentioning per-key RGB customization and individual-key lighting changes in software.

Product 2: Logitech G915 X Lightspeed
4.8

Per-key lighting control is clearly supported, with individual key color changes available in software.

polling rate
Product 1: Logitech G515 Rapid
3.5

The board is explicitly described as using a stable 1,000 Hz polling rate, but it is also noted that it does not reach 8,000 Hz.

Product 2: Logitech G915 X Lightspeed
3.8

Evidence supports a gaming-grade 1000 Hz report rate, but not a class-leading one versus faster rivals.

portability
Product 1: Logitech G515 Rapid
4.5

Its light weight and slim TKL footprint make it easier to place and carry than bulkier full-height boards.

Product 2: Logitech G915 X Lightspeed
4.0

The slim design helps portability, especially for TKL coverage, but full-size versions are less bag-friendly.

profile management
Product 1: Logitech G515 Rapid
3.3

Profile support exists, but reviewers report some friction around profile saving, switching, or reliability depending on the setup.

Product 2: Logitech G915 X Lightspeed
4.6

App-specific and game-specific profile management is supported and repeatedly mentioned as useful.

rapid trigger support
Product 1: Logitech G515 Rapid
4.5

Rapid Trigger support is repeatedly highlighted as a major feature and one of the biggest practical gaming benefits of the keyboard.

Product 2: Logitech G915 X Lightspeed
1.1

Reviews explicitly note that rapid trigger support is absent, with some rivals offering it instead.

reliability
Product 1: Logitech G515 Rapid
4.5

General reliability is positive, with reviews describing the board as consistently responsive in use and software that stays stable during operation.

Product 2: Logitech G915 X Lightspeed
4.7

Day-to-day reliability is positive in the evidence, with reviewers reporting stable use and no meaningful issues.

RGB customization
Product 1: Logitech G515 Rapid
4.5

RGB customization is broad, with software control over colors, effects, and other lighting behavior receiving positive mention.

Product 2: Logitech G915 X Lightspeed
4.6

RGB customization is deep overall, with broad effect and assignment control, though one review wanted more flexible effect mixing.

RGB lighting quality
Product 1: Logitech G515 Rapid
3.7

Lighting quality is generally attractive and vibrant, but multiple reviews also note uneven illumination on larger keys or legends.

Product 2: Logitech G915 X Lightspeed
4.4

Lighting is generally bright and attractive, with only minor complaints about coverage or presentation in some cases.

size and form factor
Product 1: Logitech G515 Rapid
4.5

The keyboard's form factor is a major selling point: it is repeatedly described as a very slim 22 mm low-profile TKL board.

Product 2: Logitech G915 X Lightspeed
4.6

The low-profile, ultra-thin form factor is one of the product's biggest strengths, though full-size versions take more room.

software quality
Product 1: Logitech G515 Rapid
3.9

G Hub is widely seen as powerful and feature-rich, but several reviews also describe it as clunky, less friendly, or awkward in some workflows.

Product 2: Logitech G915 X Lightspeed
3.5

G Hub offers a lot of power, but the reviews are mixed: some find it clean and easy, while others call it overcomplicated, unintuitive, or unstable.

sound dampening
Product 1: Logitech G515 Rapid
4.5

Dampening layers and a sound-dampened chassis help suppress echo and soften impact noise.

Product 2: Logitech G915 X Lightspeed
3.1

Sound dampening is only moderate because some reviews mention rattling, ping, or a lack of deeper sound tuning.

stabilizer quality
Product 1: Logitech G515 Rapid
4.5

At least one review specifically praises the board for feeling free of rattle and for keeping the keys properly stabilized.

Product 2: Logitech G915 X Lightspeed
4.8

At least one review specifically praises the space bar as solid and stable.

switch feel
Product 1: Logitech G515 Rapid
4.5

Switch feel is generally praised for being smooth and satisfying, though the softer low-profile character is not ideal for everyone.

Product 2: Logitech G915 X Lightspeed
4.4

Switch feel is generally satisfying and responsive, though some reviewers mention resistance, mushiness, or adaptation issues.

switch options
Product 1: Logitech G515 Rapid
No score yet
Product 2: Logitech G915 X Lightspeed
4.7

The lineup consistently offers tactile, linear, and clicky switch options.

typing comfort
Product 1: Logitech G515 Rapid
4.3

Typing comfort is generally good thanks to the quiet low-profile design and reduced strain over longer sessions.

Product 2: Logitech G915 X Lightspeed
3.9

Typing comfort is good for many users thanks to the low profile, but layout and angle can still hurt comfort for others.

typing feel
Product 1: Logitech G515 Rapid
2.5

Typing feel is the main tradeoff: several reviewers call it soft, mushy, hollow, or less satisfying than taller or more tactile alternatives.

Product 2: Logitech G915 X Lightspeed
4.1

The typing experience lands well for several reviewers, though it is not universally praised.

value for money
Product 1: Logitech G515 Rapid
2.8

Value is divisive. Some reviewers think the specialized performance justifies the price, while others see the wired design and omissions as weak value.

Product 2: Logitech G915 X Lightspeed
3.3

The feature set is strong, but the premium price keeps value mixed rather than an obvious win.

volume control
Product 1: Logitech G515 Rapid
2.0

Volume adjustment exists, but the lack of a dedicated dial or wheel is a recurring complaint.

Product 2: Logitech G915 X Lightspeed
4.7

The volume roller or wheel is one of the most consistently praised physical controls on the board.

wireless performance
Product 1: Logitech G515 Rapid
1.5

Wireless performance is effectively absent because this model is wired-only, and several reviewers treat that missing convenience as a meaningful downside.

Product 2: Logitech G915 X Lightspeed
4.7

Wireless performance is widely described as stable, fast, and close to wired use, with generally strong range.

wrist rest quality
Product 1: Logitech G515 Rapid
No score yet
Product 2: Logitech G915 X Lightspeed
1.0

Reviews note that no wrist rest or palm rest is included, so support in this area is limited.