Between the K2 Max and Air75 V2, the K2 Max comes out ahead in several specs, while the Air75 V2 wins on several specs. Overall, the K2 Max 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.
The K2 Max doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
The Air75 V2 similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable size, hot-swappable, wireless, 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 Keychron - K2 Max wins
- No decisive advantages.
Why NuPhy - Air75 V2 wins
- No decisive advantages.
Spec comparison
Switches
| Spec | Keychron - K2 Max | NuPhy - Air75 V2 |
|---|---|---|
| Switch type | Gateron G Pro | Gateron Low-profile |
| Hot-swappable | true | true |
Layout & Build
| Spec | Keychron - K2 Max | NuPhy - Air75 V2 |
|---|---|---|
| Size | 75% | 75% |
| RGB | true | true |
| Rotary knob | false | false |
| Case material | Plastic | Aluminum + Plastic |
Connectivity
| Spec | Keychron - K2 Max | NuPhy - Air75 V2 |
|---|---|---|
| Wireless | true | true |
| 2.4 GHz | true | true |
| Battery | 100 h | 120 hlead |
| Polling rate | 1000 Hz | 1000 Hz |
Frequently asked
Spec-level deep dives
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