Sirius Ursa Major V2 vs Promotype Key Boy Advance 50 Specs

Compare Sirius Ursa Major V2 vs Promotype Key Boy Advance 50 Differences Side by Side

Explore the comprehensive side-by-side comparison of the Sirius Ursa Major V2 and Promotype Key Boy Advance 50 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
Rating	0.0 stars (0 reviews)	0.0 stars (0 reviews)
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Main differences	Released in 2025 Available in a Other layout Offers Split ergonomics Comes with a knob Compatible with both Mac and Windows Connects via USB-C Supports QMK firmware Supports VIA configuration Features N-key rollover Includes screw-in stabilizers Has built-in sound dampening Supports Bluetooth, Wired, Wireless connectivity Runs at a 1000 Hz polling rate Equipped with a 2400 mAh battery Weighs about 1400 g Sized at 14 x 36 x 4 mm Made with a Aluminum case	Released in 2026 Offers Normal ergonomics Supports Wired, Wired only connectivity Made with a Polycarbonate case
Score	Scores Performance: 67.5 Build Quality: 81.5 Productivity: 97.3 Customizability: 92 Portability: 90.1	Scores Performance: 53.8 Build Quality: 46.8 Productivity: 54 Customizability: 57.2 Portability: 43.2
Name	Name Sirius Ursa Major V2	Name Promotype Key Boy Advance 50
Release year	Release year 2025	Release year 2026
Switch Options	Switch Options -	Switch Options -
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size Other	Layout Size Unknown
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Split	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, Wired, Wireless	Connection Wired, Wired only
Polling Rate	Polling Rate 1000 Hz	Polling Rate -
Battery capacity	Battery capacity 2400 mAh	Battery capacity -
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 -
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight	Backlight
Case Colors	Case Colors	Case Colors
Case Material	Case Material Aluminum	Case Material Polycarbonate
Keycaps Material	Keycaps Material -	Keycaps Material -
Dimensions	Dimensions 14 x 36 x 4 mm	Dimensions -
Weight	Weight 1400g	Weight -

[In Stock] Ursa Major V2 Wireless Aluminum Ultimate Keyboard - Image: 3

[Group-Buy] Key Boy Advance 50 Custom Keyboard Kit

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0.0 stars (0 reviews)

Released in 2025
Available in a Other layout
Offers Split ergonomics
Comes with a knob
Compatible with both Mac and Windows
Connects via USB-C
Supports QMK firmware
Supports VIA configuration
Features N-key rollover
Includes screw-in stabilizers
Has built-in sound dampening
Supports Bluetooth, Wired, Wireless connectivity
Runs at a 1000 Hz polling rate
Equipped with a 2400 mAh battery
Weighs about 1400 g
Sized at 14 x 36 x 4 mm
Made with a Aluminum case

Released in 2026
Offers Normal ergonomics
Supports Wired, Wired only connectivity
Made with a Polycarbonate case

Scores

Performance: 67.5
Build Quality: 81.5
Productivity: 97.3
Customizability: 92
Portability: 90.1

Scores

Performance: 53.8
Build Quality: 46.8
Productivity: 54
Customizability: 57.2
Portability: 43.2

Name

Sirius Ursa Major V2

Name

Promotype Key Boy Advance 50

Release year

2025

Release year

2026

Switch Options

Profile

Normal Profile

Profile

Normal Profile

Hot Swappable

Layout Size

Other

Layout Size

Unknown

Layout Standard

ANSI

Layout Standard

ANSI

Layout Ergonomics

Split

Layout Ergonomics

Normal

Knob Support

Display Support

Mac/Win Support

Multi-Media Keys

USB-C

USB passthrough

Connection

Bluetooth, Wired, Wireless

Connection

Wired, Wired only

Polling Rate

1000 Hz

Polling Rate

Battery capacity

2400 mAh

Battery capacity

Hall Effect Support

QMK Support

VIA Support

VIAL Support

N-Key Rollover

Rapid Trigger

Mount Style

Screw in Stabilizers

Sound Dampening

Backlight

Case Colors

Case Material

Aluminum

Case Material

Polycarbonate

Keycaps Material

Dimensions

14 x 36 x 4 mm

Dimensions

Weight

1400g

Weight

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