Keychron C3 Pro vs C4 HETKL vs Full-Size Hall Effect

The C3 Pro is an 80% TKL with a choice of Keychron Super or Apex mechanical switches, while the C4 HE is a 100% full-size board built around Keychron Ultra-fast Lime Magnetic Switches. The C4 HE also adds multi-media keys and a numpad. Both are wired and rated at 8000 Hz polling.

Yes, both are listed as hot-swappable, but the compatible switch types differ. The C3 Pro accepts 3-pin and 5-pin MX-style mechanical switches such as Cherry, Gateron, Kailh, and Panda. The C4 HE swaps only with compatible Hall Effect magnetic switches.

The C3 Pro listing states QMK firmware support and the Keychron Launcher web app for remapping and macros. The C4 HE listing focuses on the Launcher web app for remapping, macros, lighting, actuation, and polling rate. Check the current product page before relying on QMK for the C4 HE.

The C4 HE is the stronger gaming pick because its Hall Effect magnetic switches allow adjustable actuation through the Launcher web app. It also ships at 8000 Hz polling in Type-C wired mode. The C3 Pro still offers 8000 Hz polling and hot-swappable mechanical switches if you prefer a traditional feel.

Yes, the C4 HE uses a 100% full-size ANSI layout with a numpad and multi-media keys, which helps with spreadsheets and quick volume control. Its screw-in stabilizers are listed to reduce wobble on the space bar, shift, enter, and delete keys. The main trade-off is its larger footprint.

The C3 Pro is the more portable of the two, measuring 365 mm long and weighing 830 g. The C4 HE measures 446 mm long and weighs 970 g. Neither offers wireless connectivity, so both need a cable.

The C3 Pro uses Cherry profile double-shot PBT keycaps with shine-through legends on the RGB version. The C4 HE also uses Cherry profile double-shot PBT keycaps, though its listing does not mention shine-through. Both use north-facing RGB LEDs.

Yes, both list three adjustable typing angles. The C3 Pro supports 4, 6, and 8.7 degrees, and the C4 HE lists the same 4, 6, and 8.7 degree range. The metadata also lists 6 and 4 degree positions for the C3 Pro.

Both the C3 Pro and C4 HE are rated at 8000 Hz polling. The Launcher web app lets you switch among 1000, 4000, and 8000 Hz on either board. The C4 HE listing states the 8000 Hz rate is active out of the box in Type-C wired mode.

Yes, the C4 HE uses a 100% full-size ANSI layout, which includes a numpad. The C3 Pro is an 80% TKL layout without a numpad. This is the main reason to choose the C4 HE for data-heavy work.

The Keychron listing shows Keychron Super Red, Super Brown, and Super Banana switches, plus Keychron Apex Red and Apex Brown options. These are mechanical switches, and the board is hot-swappable for other MX-style switches. The C4 HE instead ships with Keychron Ultra-fast Lime Magnetic Switches.

The C4 HE offers more tuning through adjustable actuation and Hall Effect switch swaps, plus screw-in stabilizers and EVA acoustic foam. The C3 Pro is also mod friendly with its hot-swap socket for MX-style switches and QMK support. The choice depends on whether you want magnetic switch tuning or broad mechanical switch compatibility.