Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Logitech - G309 Lightspeed | BenQ - EC1-CW |
|---|---|---|
| Max DPI | 25600 | 3200 |
| Battery | 300 h | 70 h |
| Weight | 68 g | 77 g |
| Buttons | 6 | 5 |
Between the G309 Lightspeed and EC1-CW, the G309 Lightspeed comes out ahead in max dpi / battery, while the EC1-CW wins on several specs. Overall, the G309 Lightspeed scores 63.1 and the EC1-CW scores 50.7 on our Mars Score.
Which should you buy?
The G309 Lightspeed is the clear pick on raw spec strength, leading by 12.4 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 G309 Lightspeed if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are max dpi, battery, weight, among others. The single most decisive one: Max DPI — 700.00% more. 25600 vs 3200.
The EC1-CW similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable polling rate, wireless, so those specs do not separate the two — focus on the differences below.
Bottom line: the G309 Lightspeed 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: Logitech - G309 Lightspeed or BenQ - EC1-CW?
Logitech - G309 Lightspeed leads the current Mars Score by 12.4 points.The more useful decision is the trade-off behind that result: compare max dpi, weight against the way you will actually use the product.
Choose Logitech - G309 Lightspeed if…
Logitech - G309 Lightspeed has the measurable edge on max dpi, battery h, weight g.
Choose BenQ - EC1-CW if…
BenQ - EC1-CW does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
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 Logitech - G309 Lightspeed wins
- ▲Max DPI — 700.00% more. 25600 vs 3200.
- ▲Battery — 328.57% more. 300 h vs 70 h.
- ▲Weight — 9.00 g less. 68 vs 77.
- ▲Buttons — 1.00 more. 6 vs 5.
Why BenQ - EC1-CW wins
- No decisive advantages.
Spec comparison
Sensor
| Spec | Logitech - G309 Lightspeed | BenQ - EC1-CW |
|---|---|---|
| Max DPI | 25600lead | 3200 |
| Max IPS | 400 | 400 |
| Polling rate | 1000 Hz | 1000 Hz |
Design
| Spec | Logitech - G309 Lightspeed | BenQ - EC1-CW |
|---|---|---|
| Weight | 68 glead | 77 g |
| Buttons | 6lead | 5 |
| Shape | Right-handed | Right-handed |
Connectivity
| Spec | Logitech - G309 Lightspeed | BenQ - EC1-CW |
|---|---|---|
| Wireless | true | true |
| Battery | 300 hlead | 70 h |