Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Keychron - K2 Max | NuPhy - Halo65 |
|---|---|---|
| Size | 75% | 65% |
Between the K2 Max and Halo65, the K2 Max comes out ahead in size, while the Halo65 wins on several specs. Overall, the K2 Max scores 64.5 and the Halo65 scores 64.5 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 K2 Max if you care most about size. The biggest gaps in its favor are size. The single most decisive one: Size: 75% (vs 65%).
The Halo65 similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable switch type, hot-swappable, wireless, 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.
Which should you buy: Keychron - K2 Max or NuPhy - Halo65?
The two products are effectively tied on the current Mars Score.The more useful decision is the trade-off behind that result: compare size against the way you will actually use the product.
Choose Keychron - K2 Max if…
Keychron - K2 Max has the measurable edge on size.
Choose NuPhy - Halo65 if…
NuPhy - Halo65 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Keychron - K2 Max wins
- ▲Size: 75% (vs 65%).
Why NuPhy - Halo65 wins
- No decisive advantages.
Spec comparison
Switches
| Spec | Keychron - K2 Max | NuPhy - Halo65 |
|---|---|---|
| Switch type | Gateron G Pro | Gateron G Pro |
| Hot-swappable | true | true |
Layout & Build
| Spec | Keychron - K2 Max | NuPhy - Halo65 |
|---|---|---|
| Size | 75%lead | 65% |
| RGB | true | true |
| Rotary knob | false | false |
| Case material | Plastic | Plastic |
Connectivity
| Spec | Keychron - K2 Max | NuPhy - Halo65 |
|---|---|---|
| Wireless | true | true |
| 2.4 GHz | true | true |
| Battery | 100 h | 100 h |
| Polling rate | 1000 Hz | 1000 Hz |