Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Finalmouse - ULX | Logitech - G309 Lightspeed |
|---|---|---|
| Polling rate | 4000 Hz | 1000 Hz |
| Battery | 100 h | 300 h |
| Weight | 39 g | 68 g |
| Max DPI | 26000 | 25600 |
Between the ULX and G309 Lightspeed, the ULX comes out ahead in polling rate / weight, while the G309 Lightspeed wins on battery. Overall, the ULX scores 71.9 and the G309 Lightspeed scores 63.1 on our Mars Score.
Which should you buy?
The ULX is the clear pick on raw spec strength, leading by 8.8 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
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 polling rate, weight, max dpi. The single most decisive one: Polling rate — 300.00% more. 4000 Hz vs 1000 Hz.
Pick the G309 Lightspeed if you care most about battery. Its strongest claims are battery. The single most decisive one: Battery — 200.00% more. 300 h vs 100 h.
Both ship with comparable wireless, buttons, so those specs do not separate the two — focus on the differences below.
Bottom line: the ULX 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 Logitech - G309 Lightspeed?
Finalmouse - ULX leads the current Mars Score by 8.8 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 polling rate hz, weight g, max dpi.
Choose Logitech - G309 Lightspeed if…
Logitech - G309 Lightspeed has the measurable edge on 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
- ▲Polling rate — 300.00% more. 4000 Hz vs 1000 Hz.
- ▲Weight — 29.00 g less. 39 vs 68.
- ▲Max DPI — 1.56% more. 26000 vs 25600.
Why Logitech - G309 Lightspeed wins
- ▲Battery — 200.00% more. 300 h vs 100 h.
Spec comparison
Sensor
| Spec | Finalmouse - ULX | Logitech - G309 Lightspeed |
|---|---|---|
| Max DPI | 26000lead | 25600 |
| Max IPS | 650lead | 400 |
| Polling rate | 4000 Hzlead | 1000 Hz |
Design
| Spec | Finalmouse - ULX | Logitech - G309 Lightspeed |
|---|---|---|
| Weight | 39 glead | 68 g |
| Buttons | 6 | 6 |
| Shape | Symmetrical | Right-handed |
Connectivity
| Spec | Finalmouse - ULX | Logitech - G309 Lightspeed |
|---|---|---|
| Wireless | true | true |
| Battery | 100 h | 300 hlead |