Compare Keychron K15 Max vs K3 QMK V3 Differences Side by Side

The biggest split is layout and keycap material. The K15 Max uses an Alice 75% ergonomic layout with double-shot PBT keycaps, while the K3 QMK V3 keeps a normal low-profile layout and adds ISO options such as DE, Nordic, UK and ANSI with shine-through ABS keycaps. Both run QMK firmware and offer hot-swappable versions.

No, the K15 Max listing specifies ANSI only. If you need German, Nordic, UK or other ISO variants, the K3 QMK V3 explicitly lists ISO, ISO-DE, ISO-Nordic, ISO-UK and ANSI options. That makes the K3 QMK V3 the choice for non-US typists.

The K15 Max has a 2000mAh battery that Keychron rates for up to 95 hours. The K3 QMK V3 uses a 1550mAh battery rated for up to 124 hours with backlight off, or up to 82 hours at lowest RGB brightness. The ratings are measured differently, so compare them as vendor figures rather than direct equivalents.

Both list 1000 Hz polling, with the K15 Max specifying it on 2.4 GHz and wired modes and the K3 QMK V3 listing 1000 Hz on wired mode. Both also specify 90 Hz polling in Bluetooth mode. For low-latency wireless play, the K15 Max is the one with a 2.4 GHz dongle option.

Both offer hot-swap, but only in the RGB hot-swappable variant according to each vendor page. Both are limited to Gateron or Keychron low-profile mechanical switches, because QMK does not support low-profile optical switches. Check the variant before ordering if hot-swap matters to you.

The K3 QMK V3 weighs 540g versus 700g for the K15 Max. The K3 QMK V3 also has a smaller footprint at 306 x 116 mm compared with 370 x 143 mm. Both are low profile, but the K3 QMK V3 is the more portable of the two.

The K15 Max uses IXPE acoustic foam plus latex foam for switch support and dampening. The K3 QMK V3 layers IXPE, EPDM and latex foam. Both aim to reduce hollow sound, though the K3 QMK V3 adds one more foam type.

Yes, both are QMK-based and support the Keychron Launcher web app for key remapping and macros. The Launcher requires a Chromium-based browser such as Chrome, Edge or Opera and a wired connection. Some users report firmware flashing on Linux can be awkward on both models.

The K15 Max uses low-profile double-shot PBT keycaps, which Keychron describes as oil resistant and non-shine-through. The K3 QMK V3 uses LSA profile shine-through ABS keycaps. PBT generally resists shine better, while the K3 QMK V3 ABS caps are designed for backlight shine-through.

User reviews note the Alice layout takes some adjustment, with one describing it as enforcing good touch-typing discipline. The low-profile design and 3° typing angle are aimed at ergonomic comfort for long sessions. If you have never used a split or angled layout, expect a learning curve.

Both support QMK remapping and macros, so the choice comes down to layout and material. The K15 Max adds five extra macro keys per a user review and uses PBT keycaps that hold up to heavy daily use. Choose the K3 QMK V3 instead if you need an ISO layout for your language.

No, the K3 QMK V3 listing only includes Bluetooth 5.2 and wired USB-C connections. The K15 Max lists 2.4 GHz, Bluetooth and wired, so it is the one with a dongle option. If you rely on a low-latency wireless dongle, the K15 Max is the fit.