Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Finalmouse - ULX | Razer - DeathAdder V4 Pro |
|---|---|---|
| Polling rate | 4000 Hz | 8000 Hz |
| Max DPI | 26000 | 45000 |
| Battery | 100 h | 150 h |
| Weight | 39 g | 56 g |
| Buttons | 6 | 8 |
Between the ULX and DeathAdder V4 Pro, the ULX comes out ahead in weight, while the DeathAdder V4 Pro wins on polling rate / max dpi. Overall, the ULX scores 71.9 and the DeathAdder V4 Pro scores 79.3 on our Mars Score.
Which should you buy?
The DeathAdder V4 Pro edges ahead on the Mars Score (71.9 vs 79.3), but the 7.4-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the ULX if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight. The single most decisive one: Weight — 17.00 g less. 39 vs 56.
Pick the DeathAdder V4 Pro if you care most about polling rate / max dpi. Its strongest claims are polling rate, max dpi, battery, among others. The single most decisive one: Polling rate — 100.00% more. 8000 Hz vs 4000 Hz.
Both ship with comparable wireless, so those specs do not separate the two — focus on the differences below.
Bottom line: the DeathAdder V4 Pro is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Finalmouse - ULX or Razer - DeathAdder V4 Pro?
Razer - DeathAdder V4 Pro leads the current Mars Score by 7.4 points.The more useful decision is the trade-off behind that result: compare max dpi, polling rate, weight against the way you will actually use the product.
Choose Finalmouse - ULX if…
Finalmouse - ULX has the measurable edge on weight g.
Choose Razer - DeathAdder V4 Pro if…
Razer - DeathAdder V4 Pro has the measurable edge on polling rate hz, max dpi, battery h.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Finalmouse - ULX wins
- ▲Weight — 17.00 g less. 39 vs 56.
Why Razer - DeathAdder V4 Pro wins
- ▲Polling rate — 100.00% more. 8000 Hz vs 4000 Hz.
- ▲Max DPI — 73.08% more. 45000 vs 26000.
- ▲Battery — 50.00% more. 150 h vs 100 h.
- ▲Buttons — 2.00 more. 8 vs 6.
Spec comparison
Sensor
| Spec | Finalmouse - ULX | Razer - DeathAdder V4 Pro |
|---|---|---|
| Max DPI | 26000 | 45000lead |
| Max IPS | 650 | 800lead |
| Polling rate | 4000 Hz | 8000 Hzlead |
Design
| Spec | Finalmouse - ULX | Razer - DeathAdder V4 Pro |
|---|---|---|
| Weight | 39 glead | 56 g |
| Buttons | 6 | 8lead |
| Shape | Symmetrical | Right-handed |
Connectivity
| Spec | Finalmouse - ULX | Razer - DeathAdder V4 Pro |
|---|---|---|
| Wireless | true | true |
| Battery | 100 h | 150 hlead |