Between the MX Keys S and Air75 V2, the MX Keys S comes out ahead in size, while the Air75 V2 wins on hot-swappable. Overall, the MX Keys S scores 44.3 and the Air75 V2 scores 44.3 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes, with the decision sitting on which individual spec advantages weigh more for your use.
Pick the MX Keys S if you care most about size. The biggest gaps in its favor are size.
Pick the Air75 V2 if you care most about hot-swappable. Its strongest claims are hot-swappable.
Both ship with comparable wireless, polling rate, rotary knob, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.
Why Logitech - MX Keys S wins
- ▲Size: Full (vs 75%).
Why NuPhy - Air75 V2 wins
- ▲Has Hot-swappable.
Spec comparison
Switches
| Spec | Logitech - MX Keys S | NuPhy - Air75 V2 |
|---|---|---|
| Switch type | Scissor | Gateron Low-profile |
| Hot-swappable | false | truelead |
Layout & Build
| Spec | Logitech - MX Keys S | NuPhy - Air75 V2 |
|---|---|---|
| Size | Fulllead | 75% |
| RGB | false | truelead |
| Rotary knob | false | false |
| Case material | Plastic | Aluminum + Plastic |
Connectivity
| Spec | Logitech - MX Keys S | NuPhy - Air75 V2 |
|---|---|---|
| Wireless | true | true |
| 2.4 GHz | false | truelead |
| Battery | 240 hlead | 120 h |
| Polling rate | 1000 Hz | 1000 Hz |
Frequently asked
Spec-level deep dives
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