Compare Keychron B40 vs K8 Ultra Differences Side by Side

Explore the comprehensive side-by-side comparison of the Keychron B40 and Keychron K8 Ultra and view their biggest differences. The detailed comparison table allows you to see all the essential features, specifications, and benefits of each keyboard at a glance. Whether you're looking for performance, value, or specific functionalities, this comparison tool helps you make an informed decision.

Model
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Rating	0.0 stars (0 reviews)	5.0 stars (3 reviews)
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Main differences	Features a low-profile design Available in a 75% layout Built with the ANSI layout standard Offers Alice ergonomics Comes with a knob Runs at a 1000 Hz polling rate Equipped with a 800 mAh battery Weighs about 595 g Made with a ABS case Features ABS keycaps Offers No RGB lighting	Supports hot-swappable switches Available in a 80% layout Built with the ANSI, ISO, ISO-ES layout standard Offers Normal ergonomics Provides dedicated media keys Supports QMK firmware Supports VIA configuration Features N-key rollover Includes screw-in stabilizers Has built-in sound dampening Uses a Plate Mount mounting style Runs at a 8000 Hz polling rate Equipped with a 4000 mAh battery Weighs about 1299 g Made with a Aluminum, ABS, Metal case Features PBT keycaps Offers Yes, Rgb, White, South-face, Rgb South-face, White South-face RGB lighting
Score	Scores Performance: 51.8 Build Quality: 46.2 Productivity: 81.4 Customizability: 45.8 Portability: 78.4	Scores Performance: 90.2 Build Quality: 82.6 Productivity: 94.3 Customizability: 92.6 Portability: 76.8
Name	Name Keychron B40	Name Keychron K8 Ultra
Release year	Release year 2026	Release year 2026
Switch Options	Switch Options Linear, Tactile, Clicky	Switch Options Linear, Tactile, Clicky
Profile	Profile Low Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 75%	Layout Size 80%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI, ISO, ISO-ES
Layout Ergonomics	Layout Ergonomics Alice	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support
Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough
Connection	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate 1000 Hz	Polling Rate 8000 Hz
Battery capacity	Battery capacity 800 mAh	Battery capacity 4000 mAh
Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style -	Mount Style Plate Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight	Backlight Rgb, White, South-face, White South-face
Case Colors	Case Colors	Case Colors
Case Material	Case Material ABS	Case Material Aluminum, ABS, Metal
Keycaps Material	Keycaps Material ABS	Keycaps Material PBT
Dimensions	Dimensions -	Dimensions -
Weight	Weight 595g	Weight 1299g