Keychron K3 Max vs K4 V3Low Profile vs Full Layout

The Keychron K4 V3 has a much larger 4000mAh battery compared to the K3 Max's 1550mAh battery. This means the K4 V3 can last significantly longer on a single charge, making it a better choice for users who want to minimize the frequency of charging.

The K4 V3's hot-swappable version supports almost all 3-pin and 5-pin MX style switches, as confirmed by the manufacturer. The K3 Max, however, is only compatible with Gateron and Keychron low-profile mechanical switches, which are not standard MX height.

The K3 Max is generally better for gaming because it features a dedicated 2.4 GHz wireless mode with a 1000 Hz polling rate, which is ideal for low-latency gaming. The K4 V3 offers a 1000 Hz polling rate but only via a wired connection, as its wireless mode is Bluetooth only.

Yes, both the Keychron K3 Max and the Keychron K4 V3 support QMK firmware and VIA software for deep customization. This allows you to remap keys, create macros, and adjust lighting effects using the Keychron Launcher web app on macOS, Windows, and Linux.

The K4 V3 offers three adjustable typing angles (5, 8, and 11 degrees) according to the vendor, providing more ergonomic flexibility. The K3 Max has two adjustable levels (7 and 3 degrees), which may be less adaptable for some users.

The K3 Max is far more suitable for travel due to its lighter weight (580g), slim low-profile design, and smaller 75% layout. It is much easier to pack than the larger and heavier 96% K4 V3.

The Keychron K4 V3 has a 96% layout that includes a dedicated number pad, making it ideal for data entry and accounting tasks. The K3 Max is a 75% keyboard and does not have a number pad.

Both keyboards are available in hot-swappable versions. The K3 Max hot-swappable version allows you to change low-profile Gateron switches without soldering, while the K4 V3 hot-swappable version supports almost all standard 3-pin and 5-pin MX switches for broader compatibility.

Both keyboards feature sound dampening. The K3 Max includes IXPE acoustic foam and latex foam specifically for quieter keystrokes, according to the manufacturer. The K4 V3 uses multiple foam layers (IXPE, EPDM, PET) for similar noise reduction, though a user review notes the V3 sounds 'thocky and creamy'.

Yes, both the K3 Max and K4 V3 are designed for Mac and Windows compatibility. They include keycaps for both operating systems and allow you to configure separate keymaps for each platform using the Keychron Launcher.

Both keyboards are priced similarly, with the K3 Max available from $84 to $169 and the K4 V3 from $84 to $114. The K4 V3 generally has a lower top-end price, making it a more budget-friendly option for users who want a full-featured keyboard.

The K3 Max features a combination of an aluminum frame and an ABS plastic bottom, giving it a more premium feel. The K4 V3 is made primarily of plastic, though an aluminum frame version is available. Both offer PBT keycaps, with the K3 Max using a low-profile double-shot PBT and the K4 V3 using Cherry profile double-shot PBT.