Between the Q3 Max and MX Keys S, the Q3 Max comes out ahead in hot-swappable / rotary knob, while the MX Keys S wins on size. Overall, the Q3 Max scores 44.3 and the MX Keys S scores 44.3 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes; the decision sits on which individual spec advantages weigh more for your use.
Pick the Q3 Max if you care most about hot-swappable / rotary knob. The biggest gaps in its favor are hot-swappable, rotary knob.
Pick the MX Keys S if you care most about size. Its strongest claims are size.
Both ship with comparable wireless, polling rate, so those specs do not 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 says both are well-rounded; the differences are about trade-offs, not quality.
Why Keychron - Q3 Max wins
- ▲Has Hot-swappable.
- ▲Has Rotary knob.
Why Logitech - MX Keys S wins
- ▲Size: Full (vs TKL).
Spec comparison
Switches
| Spec | Keychron - Q3 Max | Logitech - MX Keys S |
|---|---|---|
| Switch type | Gateron Jupiter Banana | Scissor |
| Hot-swappable | truelead | false |
Layout & Build
| Spec | Keychron - Q3 Max | Logitech - MX Keys S |
|---|---|---|
| Size | TKL | Fulllead |
| RGB | truelead | false |
| Rotary knob | truelead | false |
| Case material | Aluminum | Plastic |
Connectivity
| Spec | Keychron - Q3 Max | Logitech - MX Keys S |
|---|---|---|
| Wireless | true | true |
| 2.4 GHz | truelead | false |
| Battery | 100 h | 240 hlead |
| Polling rate | 1000 Hz | 1000 Hz |
Spec-level deep dives
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