Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | HP - Z2 Mini G1a | Lenovo - ThinkCentre M90q Gen 5 |
|---|---|---|
| RAM | 64 GB | 32 GB |
| TDP | 120 W | 85 W |
| Volume | 2.7 L | 1.35 L |
Between the Z2 Mini G1a and ThinkCentre M90q Gen 5, the Z2 Mini G1a comes out ahead in ram, while the ThinkCentre M90q Gen 5 wins on tdp / volume. Overall, the Z2 Mini G1a scores 60.1 and the ThinkCentre M90q Gen 5 scores 66.4 on our Mars Score.
Which should you buy?
The ThinkCentre M90q Gen 5 edges ahead on the Mars Score (60.1 vs 66.4), but the 6.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Z2 Mini G1a 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. The single most decisive one: RAM — 100.00% more. 64 GB vs 32 GB.
Pick the ThinkCentre M90q Gen 5 if you care most about tdp / volume. Its strongest claims are tdp, volume. The single most decisive one: TDP — 35.00 W less. 85 vs 120.
Both ship with comparable storage, thunderbolt, so those specs do not separate the two — focus on the differences below.
Bottom line: the ThinkCentre M90q Gen 5 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: HP - Z2 Mini G1a or Lenovo - ThinkCentre M90q Gen 5?
Lenovo - ThinkCentre M90q Gen 5 leads the current Mars Score by 6.3 points.The more useful decision is the trade-off behind that result: compare ram, volume, tdp against the way you will actually use the product.
Choose HP - Z2 Mini G1a if…
HP - Z2 Mini G1a has the measurable edge on ram gb.
Choose Lenovo - ThinkCentre M90q Gen 5 if…
Lenovo - ThinkCentre M90q Gen 5 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 HP - Z2 Mini G1a wins
- ▲RAM — 100.00% more. 64 GB vs 32 GB.
Why Lenovo - ThinkCentre M90q Gen 5 wins
- ▲TDP — 35.00 W less. 85 vs 120.
- ▲Volume — 1.35 L less. 1.35 vs 2.7.
Spec comparison
Core
Form & I/O
| Spec | HP - Z2 Mini G1a | Lenovo - ThinkCentre M90q Gen 5 |
|---|---|---|
| Volume | 2.7 L | 1.35 Llead |
| Weight | 1.99 kg | 1.32 kglead |
| TDPⓘ | 120 W | 85 Wlead |
| USB ports | 6 | 6 |
| Thunderboltⓘ | true | true |