Between the MX Keys S and BlackWidow V4 Pro, the MX Keys S comes out ahead in wireless, while the BlackWidow V4 Pro wins on polling rate and rotary knob. Overall, the MX Keys S scores 44.3 and the BlackWidow V4 Pro scores 95 on our Mars Score.
Which should you buy?
The BlackWidow V4 Pro is the clear pick on raw spec strength, leading by 50.7 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 MX Keys S if you care most about wireless. The biggest gaps in its favor are wireless.
Pick the BlackWidow V4 Pro if you care most about polling rate and rotary knob. Its strongest claims are polling rate, rotary knob.
Both ship with comparable size, hot-swappable, so those specs don't separate the two — focus on the differences below.
Bottom line: the BlackWidow V4 Pro is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Logitech - MX Keys S wins
- ▲Wireless: true (vs false).
Why Razer - BlackWidow V4 Pro wins
- ▲Polling rate — 700.00% more. 8000 Hz vs 1000 Hz.
- ▲Has Rotary knob.
Spec comparison
Switches
| Spec | Logitech - MX Keys S | Razer - BlackWidow V4 Pro |
|---|---|---|
| Switch type | Scissor | Razer Green |
| Hot-swappable | false | false |
Layout & Build
| Spec | Logitech - MX Keys S | Razer - BlackWidow V4 Pro |
|---|---|---|
| Size | Full | Full |
| RGB | false | truelead |
| Rotary knob | false | truelead |
| Case material | Plastic | Aluminum |
Connectivity
| Spec | Logitech - MX Keys S | Razer - BlackWidow V4 Pro |
|---|---|---|
| Wireless | truelead | false |
| 2.4 GHz | false | false |
| Battery | 240 hlead | 0 h |
| Polling rate | 1000 Hz | 8000 Hzlead |
Spec-level deep dives
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