Keychron B1 Pro vs B31Ultra-Slim vs Ergonomic Scissor Switch

The core difference is the typing mechanism and profile. The B1 Pro uses an ultra-slim, low-profile design at just 5mm thick. The B31 uses a taller scissor switch mechanism that is marketed for silent typing and offers adjustable angle feet for ergonomics.

The Keychron B31 is explicitly designed for silent typing. Its vendor description highlights a scissor mechanism and fully pre-lubed keys for an 'ultra-quiet typing experience,' making it the better choice for shared office spaces or libraries.

For the B31, the manufacturer's specifications clearly state 'Keycaps are not replaceable.' While not explicitly stated for the B1 Pro, both are pre-built, non-hot-swappable keyboards, suggesting keycap compatibility may be limited and non-standard, especially for the B1 Pro's low-profile design.

Yes, both keyboards are compatible with macOS and Windows. They include a system toggle switch and support configuring different keymaps for each operating system through the Keychron Launcher web app.

Vendor claims differ. The B1 Pro listing claims up to 1200 hours of battery life. The B31 listing claims up to 320 hours. Both use an 800mAh battery, but actual results will vary based on usage, connection type, and lighting (neither has RGB).

Yes, the B1 Pro is well-suited for travel. Keychron describes it as 'ultra-portable' and 'lightweight.' At 5mm thick and 425g, it is significantly slimmer and lighter than the 520g B31, making it easier to pack in a bag.

Both the B1 Pro and B31 offer tri-mode connectivity: 2.4 GHz wireless (with a 1000 Hz polling rate), Bluetooth 5.2, and a wired USB-C connection. This allows you to connect to multiple devices simultaneously.

Yes, both keyboards are programmable using the Keychron Launcher, which is a web-based app. You can remap keys, create macros, and set up shortcuts without needing to install software, as it works through a compatible browser.

The B31 offers more ergonomic adjustability with its adjustable angle feet providing 6.5° and 9° options. The B1 Pro has a fixed, integrated body with a 3° typing angle, which is lower and not adjustable.

Yes. According to the B31's product description, it has a magnetic storage slot at the top right corner of the keyboard designed to hold the 2.4 GHz USB receiver when not in use.

No. The specification sheet for the B31 explicitly states 'Hot-swappable: No.' The B1 Pro is also a pre-built model, and there is no information suggesting it supports hot-swap sockets, so switch replacement is not intended for either board.

The B1 Pro is offered in multiple ISO layouts, including German (DE), UK, Nordic, Swiss, Spanish, Portuguese, Italian, Russian, and Hungarian. The B31 is listed only with an ANSI layout.