Compare Keychron K4 Ultra vs Royal Kludge S98 ES Differences Side by Side

Explore the comprehensive side-by-side comparison of the Keychron K4 Ultra and Royal Kludge S98 ES 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
	75	79	Select a keyboard to compare
Rating	5.0 stars (2 reviews)	0.0 stars (0 reviews)
Purchase Options
Main differences	Released in 2026 Has Linear, Tactile, Clicky switch options Includes a No display Provides dedicated media keys Uses a Plate Mount mounting style Runs at a 8000 Hz polling rate Equipped with a 4000 mAh battery Weighs about 1241 g Sized at 31 x 391 x 140 mm Made with a ABS case Features PBT keycaps Offers Yes, Rgb, White, South-face, Rgb South-face, White South-face RGB lighting	Released in 2025 Comes with a knob Includes a Yes, LCD display Offers a USB passthrough port Uses a Top Mount mounting style Equipped with a 3750 mAh battery Weighs about 1879 g Sized at 42 x 409 x 140 mm Features ABS keycaps Offers Yes, Rgb RGB lighting
Score	Scores Performance: 88 Build Quality: 63.4 Productivity: 86.4 Customizability: 75.7 Portability: 57.1	Scores Performance: 77.8 Build Quality: 70.3 Productivity: 90.6 Customizability: 79.4 Portability: 56.7
Name	Name Keychron K4 Ultra	Name Royal Kludge S98 ES
Release year	Release year 2026	Release year 2025
Switch Options	Switch Options Linear, Tactile, Clicky	Switch Options -
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 96%	Layout Size 96%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support LCD
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 8000 Hz	Polling Rate -
Battery capacity	Battery capacity 4000 mAh	Battery capacity 3750 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 Plate Mount	Mount Style Top Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb, White, South-face, White South-face	Backlight Rgb
Case Colors	Case Colors	Case Colors
Case Material	Case Material ABS	Case Material -
Keycaps Material	Keycaps Material PBT	Keycaps Material ABS
Dimensions	Dimensions 31 x 391 x 140 mm	Dimensions 42 x 409 x 140 mm
Weight	Weight 1241g	Weight 1879g