Corsair - M75 Air Wireless vs Logitech - G309 Lightspeed
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Corsair - M75 Air Wireless | Logitech - G309 Lightspeed |
|---|---|---|
| Battery | 100 h | 300 h |
| Polling rate | 2000 Hz | 1000 Hz |
| Weight | 60 g | 68 g |
| Max DPI | 26000 | 25600 |
Between the M75 Air Wireless and G309 Lightspeed, the M75 Air Wireless comes out ahead in polling rate / weight, while the G309 Lightspeed wins on battery. Overall, the M75 Air Wireless scores 64.9 and the G309 Lightspeed scores 63.1 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (64.9 vs 63.1). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the M75 Air Wireless 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 — 100.00% more. 2000 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: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Corsair - M75 Air Wireless or Logitech - G309 Lightspeed?
Corsair - M75 Air Wireless leads the current Mars Score by 1.8 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 Corsair - M75 Air Wireless if…
Corsair - M75 Air Wireless 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 Corsair - M75 Air Wireless wins
- ▲Polling rate — 100.00% more. 2000 Hz vs 1000 Hz.
- ▲Weight — 8.00 g less. 60 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 | Corsair - M75 Air Wireless | Logitech - G309 Lightspeed |
|---|---|---|
| Max DPI | 26000lead | 25600 |
| Max IPS | 650lead | 400 |
| Polling rate | 2000 Hzlead | 1000 Hz |
Design
| Spec | Corsair - M75 Air Wireless | Logitech - G309 Lightspeed |
|---|---|---|
| Weight | 60 glead | 68 g |
| Buttons | 6 | 6 |
| Shape | Symmetrical | Right-handed |
Connectivity
| Spec | Corsair - M75 Air Wireless | Logitech - G309 Lightspeed |
|---|---|---|
| Wireless | true | true |
| Battery | 100 h | 300 hlead |