Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | ASUS - NUC 15 Pro | GMKtec - NucBox M6 |
|---|---|---|
| RAM | 32 GB | 16 GB |
| Storage | 1024 GB | 512 GB |
| TDP | 65 W | 45 W |
| Thunderbolt | true | false |
| Volume | 0.7 L | 0.55 L |
Between the NUC 15 Pro and NucBox M6, the NUC 15 Pro comes out ahead in ram / storage, while the NucBox M6 wins on tdp / volume. Overall, the NUC 15 Pro scores 72.2 and the NucBox M6 scores 67.1 on our Mars Score.
Which should you buy?
The NUC 15 Pro edges ahead on the Mars Score (72.2 vs 67.1), but the 5.1-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the NUC 15 Pro if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. The biggest gaps in its favor are ram, storage, thunderbolt. The single most decisive one: RAM — 100.00% more. 32 GB vs 16 GB.
Pick the NucBox M6 if you care most about tdp / volume. Its strongest claims are tdp, volume. The single most decisive one: TDP — 20.00 W less. 45 vs 65.
There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.
Bottom line: the NUC 15 Pro is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: ASUS - NUC 15 Pro or GMKtec - NucBox M6?
ASUS - NUC 15 Pro leads the current Mars Score by 5.1 points.The more useful decision is the trade-off behind that result: compare ram, storage, volume, tdp against the way you will actually use the product.
Choose ASUS - NUC 15 Pro if…
ASUS - NUC 15 Pro has the measurable edge on ram gb, storage gb, has thunderbolt.
Choose GMKtec - NucBox M6 if…
GMKtec - NucBox M6 has the measurable edge on tdp w, volume l.
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 ASUS - NUC 15 Pro wins
- ▲RAM — 100.00% more. 32 GB vs 16 GB.
- ▲Storage — 100.00% more. 1024 GB vs 512 GB.
- ▲Has Thunderbolt.
Why GMKtec - NucBox M6 wins
- ▲TDP — 20.00 W less. 45 vs 65.
- ▲Volume — 0.15 L less. 0.55 vs 0.7.
Spec comparison
Core
Form & I/O
| Spec | ASUS - NUC 15 Pro | GMKtec - NucBox M6 |
|---|---|---|
| Volume | 0.7 L | 0.55 Llead |
| Weight | 0.67 kg | 0.55 kglead |
| TDPⓘ | 65 W | 45 Wlead |
| USB ports | 6lead | 4 |
| Thunderboltⓘ | truelead | false |