Compare Keychron K4 Pro vs K5 QMK V2 Differences Side by Side

Neither is universally better, since they target different typing preferences. The K4 Pro offers double-shot PBT keycaps, sound-absorbing foam with a silicone bottom pad and a 4000mAh battery, while the K5 QMK V2 is a lighter, low-profile full-size board with an ABS and aluminum frame. Buyers who prioritize keycap durability and modding flexibility tend to favor the K4 Pro.

A 96% layout like the K4 Pro keeps the number pad but compresses the navigation cluster, so the board is narrower than a full-size keyboard. The K5 QMK V2 uses a 100% layout with 108 keys and 12 dedicated multimedia keys. The trade-off is desk width versus dedicated navigation and media keys.

Yes, but the options differ. The K4 Pro hot-swap sockets accept almost all 3-pin and 5-pin MX-style switches, per Keychron, and a barebone version is available. The K5 QMK V2 hot-swap version is limited to Keychron Milk POM or Gateron and Keychron low-profile switches, and Keychron notes QMK does not support low-profile optical switches.

The K4 Pro carries a 4000mAh battery, double the 2000mAh cell in the K5 QMK V2. Keychron rates the K5 QMK V2 at up to 160 hours on the 2000mAh battery. The K4 Pro's capacity advantage should favor longer sessions, though actual runtime depends on backlight and wireless use.

Both list QMK firmware and VIA support, and both work with the Keychron Launcher web app for key remapping and macros. The Launcher requires a wired connection and a recent Chrome, Opera or Edge browser. Both boards also ship with macOS and Windows keycaps.

It is the lighter option at 732g versus 1280g for the K4 Pro. Its 424 x 119 mm footprint is longer but shallower front to back, and Bluetooth 5.2 lets you pair three devices. The low-profile Keychron Milk POM switches are described as 33% slimmer than standard profile switches.

The K4 Pro uses double-shot OSA-profile PBT keycaps, which Keychron describes as oil resistant for long-term use. The K5 QMK V2 uses shine-through ABS keycaps paired with a north-facing RGB design. PBT generally resists shine better, while shine-through ABS gives more visible backlighting.

Both are offered in white backlight and RGB backlight versions. The K4 Pro lists 22 or more RGB backlight settings and south-facing LEDs, while the K5 QMK V2 lists 22 plus dynamic RGB modes with north-facing LEDs. Both let you adjust hue, saturation, brightness and effect speed.

The K4 Pro uses screw-in PCB stabilizers and supports third-party screw-in replacements. The K5 QMK V2 uses redesigned stabilizers that Keychron says stay level with the switch and reduce wobble on the spacebar, left Shift, backspace and Enter. One K4 Pro reviewer did report a rattly spacebar that improved after relubing.

Both keyboards list a 1000 Hz polling rate for wired use. Keychron lists 125 Hz polling for the K5 QMK V2 in wireless mode, while a wireless polling figure is not provided for the K4 Pro. Both list N-key rollover for wireless and wired modes.

Yes, both offer three adjustable typing angles. The K4 Pro lists 3, 7 and 10 degrees, while the K5 QMK V2 lists 3.37, 4.36 and 6.56 degrees. The K5 QMK V2 also uses a low-profile design that sits flatter overall.

The K4 Pro has broader modding potential because its hot-swap sockets accept most 3-pin and 5-pin MX-style switches and it is sold as a barebone kit. It also supports third-party screw-in PCB stabilizers. The K5 QMK V2 is restricted to low-profile switch types and does not list a barebone option.