ATK Blazing Sky U2 Ultimate vs Razer Viper V3 Pro: Which Mouse Is Better?

Tested using Methodology v1.5.1

Updated Dec 02, 2025 06:36 PM

This review is in Early access

See Razer Viper V3 Pro Review

ConnectivityWireless

Type Standard

Default Weight 53.8 g

Ambidextrous Shape Only

ConnectivityLocked

Type Locked

Default Weight Lock g

Ambidextrous Locked

Recommended in 7 articles:
Gaming
Mouse
Wireless Gaming
4

Our Verdict

Razer Viper V3 Pro

ATK Blazing Sky U2 Ultimate

Full comparison details regarding individual product score sets can be found in the section below

Variants

Viper V3 Pro (Black)
Viper V3 Pro (Faker Edition)
Viper V3 Pro (Sentinels Edition)
Viper V3 Pro (White)

Blazing Sky U2 Ultimate (Black)
Blazing Sky U2 Ultimate (White)

Review

See ATK Blazing Sky U2 Ultimate Review

Check Price

Black

Viper V3 Pro

Black

Blazing Sky U2 Ultimate

White

Viper V3 Pro

White

Blazing Sky U2 Ultimate

Faker Edition

Viper V3 Pro

Sentinels Edition

Viper V3 Pro

Main Differences for

Work

Threshold

0.10

Work

7.3

0.0

No major differences between these mice for work. See full list of tests below.

Full Comparison

Work

7.3

0.0

Video Games (FPS)

9.5

0.0

Video Games (MMO)

8.3

0.0

Raw Performance

9.8

0.0

Design

Style

Style Picture

Compare High-Res

SAMPLE

To see pictures and test results

Type

Standard

Locked

Coating

Matte

Locked

Lighting Color

No Lighting

Locked

Show Text

Shape

3D Model

Preview 3D

SAMPLE

To see pictures and test results

Length

5.0" (127 mm)

Lock" (Lock mm)

Width

2.5" (64 mm)

Lock" (Lock mm)

Height

1.6" (40 mm)

Lock" (Lock mm)

Grip Width

63 mm

Lock mm

Ambidextrous

Shape Only

Locked

Left-Handed Friendly

Yes

Locked

Finger Rest

Locked

Show Text

Build Quality

8.5

N/A

Build quality picture

Compare High-Res

SAMPLE

To see pictures and test results

Show Text

Weight

9.3

N/A

Minimum Weight Picture

Compare High-Res

SAMPLE

To see pictures and test results

Lowest Weight

53.8 g

Lock g

Default Weight

53.8 g

Lock g

Weight Distribution

Centered

Locked

Extra Weights

Locked

Show Text

Hand Size Recommendation

Palm Grip Hand Recommendation

Compare High-Res

SAMPLE

To see pictures and test results

Claw Grip Hand Recommendation

Compare High-Res

SAMPLE

To see pictures and test results

Fingertip Grip Hand Recommendation

Compare High-Res

SAMPLE

To see pictures and test results

Show Text

Wireless Versatility

7.2

N/A

Maximum Of Paired Devices

Locked

Bluetooth

Locked

Receiver

Yes

Locked

Battery Type

Rechargeable

Locked

Use When Charging

Yes

Locked

On/Off Activation

Auto Off And On/Off Switch

Locked

Receiver Extender

Yes

Locked

Receiver Storing

Locked

Battery Indicator

Yes

Locked

Show Text

Cable

Connectivity

Wireless

Locked

Cable Length

6.2 ft (1.9 m)

Lock ft (Lock m)

Cable Type

Paracord-like

Locked

Permanent Kink

Yes

Locked

Port Type: Mouse End

USB-C

Locked

Port Type: PC End

USB-A

Locked

Show Text

Mouse Feet

9.5

N/A

Mouse Feet picture

Compare High-Res

SAMPLE

To see pictures and test results

Gliding Experience

Very Good

Locked

Material

Virgin Grade PTFE

Locked

Extra Included

Locked

Show Text

In The Box

In the box picture

Compare High-Res

SAMPLE

To see pictures and test results

Show Text

Control

Main Button

Actuation Graph

Preview Graph

SAMPLE

To see pictures and test results

Force/Distances Graph

Preview Graph

SAMPLE

To see pictures and test results

Switch Type

Optical

Locked

Switch Model

Razer Optical Mouse Switch Gen 3

Locked

Additional Buttons

7.4

N/A

Buttons Picture

Compare High-Res

SAMPLE

To see pictures and test results

Total Number Of Buttons

Lock

Number Of Side Buttons

Lock

Number Of Programmable Inputs

Lock

Profile Switching Button

Yes

Locked

Gesture Support

Locked

Show Text

Click Latency

9.9

N/A

Latency Data

Preview Graph

SAMPLE

To see pictures and test results

Expected Connection

1.0 ms

Lock ms

Wired

1.4 ms

Lock ms

Receiver

1.0 ms

Lock ms

Bluetooth

N/A

Show Text

CPI

9.7

N/A

CPI Graph

Preview Graph

SAMPLE

To see pictures and test results

SRAV Close-Up

Compare High-Res

SAMPLE

To see pictures and test results

SRAV @ 1600 CPI

-0.02%

Lock%

SRAV @ 800 CPI

-0.08%

Lock%

SRAV @ 400 CPI

0.08%

Lock%

SRAV @ Fixed CPI

N/A

Precision Error Between Speeds

0.69%

Lock%

Precision Error Between CPI

0.69%

Lock%

Worst Tracking Error

-3.62%

Lock%

Minimum CPI

100 CPI

Lock CPI

Maximum CPI

35,000 CPI

Lock CPI

CPI Adjustment Steps

1 CPI

Lock CPI

Show Text

Sensor Latency

9.7

N/A

Sensor Latency Transition Graph

Preview Graph

SAMPLE

To see pictures and test results

Delay To Start Of Movement

10.7 ms

Lock ms

Delay At Half Movement

1.4 ms

Lock ms

Delay To End Of Movement

0.7 ms

Lock ms

Show Text

Sensor Specifications

Sensor Technology

Optical (LED)

Locked

Sensor Model

Razer Focus Pro 35K

Locked

Works On Glass

Yes

Locked

Minimum Lift Off Distance

1.2 mm

Lock mm

Maximum Polling Rate

8000 Hz

Locked

Show Text

Mouse Wheel

Mouse wheel picture

Compare High-Res

SAMPLE

To see pictures and test results

Scroll Wheel Type

Notched Wheel

Locked

Scroll Wheel Tilt

Locked

Thumb Wheel Type

Locked

Show Text

Noise

Noise Video

SAMPLE

To see product videos

Click Noise

Quiet

Locked

Show Text

Operating System And Software

Configuration Software

Software Tour

SAMPLE

To see product videos

Software Name

Razer Synapse 3

Locked

Software Windows Compatibility

Yes

Locked

Software macOS Compatibility

Yes

Locked

On-Board Memory

Yes

Locked

CPI (DPI) Adjustment

Yes

Locked

Polling Rate Adjustment

Yes

Locked

Profile Configuration

Yes

Locked

Profile Auto-Switching

Yes

Locked

RGB On/Off

No RGB

Locked

Show Text

Mouse Compatibility

N/A

Windows Compatibility

Fully

Locked

macOS Compatibility

Fully

Locked

Show Text

Check Price

Black

Viper V3 Pro

Black

Blazing Sky U2 Ultimate

White

Viper V3 Pro

White

Blazing Sky U2 Ultimate

Faker Edition

Viper V3 Pro

Sentinels Edition

Viper V3 Pro