Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Razer - Cobra Pro | SteelSeries - Aerox 9 Wireless |
|---|---|---|
| Max DPI | 30000 | 18000 |
| Weight | 77 g | 89 g |
| Buttons | 10 | 18 |
| Battery | 170 h | 180 h |
Between the Cobra Pro and Aerox 9 Wireless, the Cobra Pro comes out ahead in max dpi / weight, while the Aerox 9 Wireless wins on buttons / battery. Overall, the Cobra Pro scores 61.5 and the Aerox 9 Wireless scores 55.3 on our Mars Score.
Which should you buy?
The Cobra Pro edges ahead on the Mars Score (61.5 vs 55.3), but the 6.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Cobra Pro 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, weight. The single most decisive one: Max DPI — 66.67% more. 30000 vs 18000.
Pick the Aerox 9 Wireless if you care most about buttons / battery. Its strongest claims are buttons, battery. The single most decisive one: Buttons — 8.00 more. 18 vs 10.
Both ship with comparable polling rate, wireless, so those specs do not separate the two — focus on the differences below.
Bottom line: the Cobra 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: Razer - Cobra Pro or SteelSeries - Aerox 9 Wireless?
Razer - Cobra Pro leads the current Mars Score by 6.2 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 Razer - Cobra Pro if…
Razer - Cobra Pro has the measurable edge on max dpi, weight g.
Choose SteelSeries - Aerox 9 Wireless if…
SteelSeries - Aerox 9 Wireless has the measurable edge on button count, 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 Razer - Cobra Pro wins
- ▲Max DPI — 66.67% more. 30000 vs 18000.
- ▲Weight — 12.00 g less. 77 vs 89.
Why SteelSeries - Aerox 9 Wireless wins
- ▲Buttons — 8.00 more. 18 vs 10.
- ▲Battery — 5.88% more. 180 h vs 170 h.
Spec comparison
Sensor
| Spec | Razer - Cobra Pro | SteelSeries - Aerox 9 Wireless |
|---|---|---|
| Max DPI | 30000lead | 18000 |
| Max IPS | 750lead | 400 |
| Polling rate | 1000 Hz | 1000 Hz |
Design
| Spec | Razer - Cobra Pro | SteelSeries - Aerox 9 Wireless |
|---|---|---|
| Weight | 77 glead | 89 g |
| Buttons | 10 | 18lead |
| Shape | Symmetrical | Right-handed |
Connectivity
| Spec | Razer - Cobra Pro | SteelSeries - Aerox 9 Wireless |
|---|---|---|
| Wireless | true | true |
| Battery | 170 h | 180 hlead |