Between the MX Keys S and PRO X TKL RAPID, the MX Keys S comes out ahead in size and wireless, while the PRO X TKL RAPID wins on polling rate. Overall, the MX Keys S scores 44.3 and the PRO X TKL RAPID scores 95 on our Mars Score.
Which should you buy?
The PRO X TKL RAPID 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 size and wireless. The biggest gaps in its favor are size, wireless.
Pick the PRO X TKL RAPID if you care most about polling rate. Its strongest claims are polling rate.
Both ship with comparable hot-swappable, rotary knob, so those specs don't separate the two — focus on the differences below.
Bottom line: the PRO X TKL RAPID 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
- ▲Size: Full (vs TKL).
- ▲Wireless: true (vs false).
Why Logitech - PRO X TKL RAPID wins
- ▲Polling rate — 700.00% more. 8000 Hz vs 1000 Hz.
Spec comparison
Switches
| Spec | Logitech - MX Keys S | Logitech - PRO X TKL RAPID |
|---|---|---|
| Switch type | Scissor | GX Optical Linear Hall-effect |
| Hot-swappable | false | false |
Layout & Build
| Spec | Logitech - MX Keys S | Logitech - PRO X TKL RAPID |
|---|---|---|
| Size | Fulllead | TKL |
| RGB | false | truelead |
| Rotary knob | false | false |
| Case material | Plastic | Aluminum |
Connectivity
| Spec | Logitech - MX Keys S | Logitech - PRO X TKL RAPID |
|---|---|---|
| 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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