Keychron K4 HE vs Logitech G915 X LIGHTSPEED

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K4 HE compared with G915 X LIGHTSPEED

	KeychronK4 HE	LogitechG915 X LIGHTSPEED
Overview
Released
Released	March 2025	September 2024
Typing
Layout
Layout	Full size	Full size
Switches
Switches	Magnetic (Hall effect)	Low-profile mechanical
Key travel
Key travel	–	3.2 mm
Backlight
Backlight	RGB	RGB
Keys labelled for
Keys labelled for	Mac, Windows and more	Windows
Touch ID
Touch ID	No	–
Switches
Switches	Gateron Double-Rail Magnetic Nebula (actuation 0.2–3.8 mm) or Keychron Ultra-fast Lime magnetic (actuation 0.2–3.3 mm) switches, both adjustable with 0.1 mm sensitivity; hot-swappable; TMR sensing	Low-profile GL mechanical switches, redesigned with a cross-style POM stem; Linear (43 ± 10 gf), Tactile (45 ± 10 gf) or Clicky (48 ± 13 gf); 1.3 ± 0.3 mm actuation
Key travel
Key travel	–	3.2 ± 0.25 mm total travel
Keycaps
Keycaps	Cherry-profile double-shot PBT, shine-through (Standard Version); OSA-profile double-shot PBT, not shine-through (Special Edition)	Double-shot, shine-through PBT
Layouts
Layouts	96%; ANSI (keychron.com); UK ISO Special Edition in black (keychron.uk)	English UK, English International, Danish/Norwegian/Swedish/Finnish, French, German, Italian, Spanish and Swiss (UK store)
Backlight
Backlight	North-facing RGB	LIGHTSYNC RGB, about 16.8 million colours
Special keys
Special keys	Rapid Trigger; four-in-one Dynamic Keystrokes; Last Keystroke Prioritization and Snap Click; N-key rollover wireless and wired	Nine G-keys; KEYCONTROL (any key can hold macros or layered commands); soft-touch media keys; volume roller
Connections and battery
Connects by
Connects by	Bluetooth, USB receiver and Cable	Bluetooth, USB receiver and Cable
Devices it switches between
Devices it switches between	3	–
Power
Power	Rechargeable	Rechargeable
Battery life (maker's claim)
Battery life (maker's claim)	Up to 110 hours	Up to 800 hours
Receiver
Receiver	2.4 GHz USB receiver at 1,000 Hz polling; Bluetooth 5.2 at 125 Hz to up to three devices; USB-C wired at 1,000 Hz	LIGHTSPEED USB receiver (1 ms report rate), Bluetooth 5.0, or USB wired with the included USB-A to USB-C cable (1.8 m)
Battery life detail
Battery life detail	4,000 mAh lithium-polymer battery; up to 110 hours (Keychron's lab tests; Keychron doesn't say with what backlight setting)	Rechargeable, not user-replaceable; up to 800 hours with lighting off and up to 36 hours at 100% RGB brightness on LIGHTSPEED (press release); Logitech's specification sheet lists up to 36 hours
Charging
Charging	–	USB-C, with the included 1.8 m USB-A to USB-C charging and data cable
Works with
Works with	Windows, macOS and Linux	Windows 10 (version 1809) or later, macOS 11 or later, Android 4.3 or later and iOS 10 or later
Software
Software	QMK firmware; Keychron Launcher web app for actuation, Rapid Trigger, key remapping and lighting	Logitech G HUB
Design
Weight
Weight	1090 g	1080 g (better)
Width × depth × height
Width × depth × height	373 × 126 × 40.3 mm	475 × 150 × 22.6 mm
Size
Size	373 × 126 mm, about 1,090 g (Standard Version); 377 × 126 mm, about 1,066 g (Special Edition); 31.0 mm high at the front and 40.3 mm at the back with keycaps (31.7 and 40.9 mm on the Special Edition); typing angles of 5°, 8° and 11°	475 × 150 × 22.6 mm; 1,080 g
Materials
Materials	Aluminium body (aluminium and wood on the Special Edition); ABS bottom case; aluminium plate; plate-mounted stabilisers	Brushed aluminium alloy top plate (1.5 mm thick)
Colours
Colours	Black (Standard Version); Black or White with wood sides (Special Edition)	Black, White (Black only on the UK store)
In the box
In the box	–	Keyboard, LIGHTSPEED USB receiver, USB-A to USB-C charging and data cable, documentation
Warranty
Warranty	–	2-year limited hardware warranty