Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - Galaxy S25 Ultra | Nubia - Z70 Ultra |
|---|---|---|
| Main camera | 200 MP | 50 MP |
| Wired charging | 45 W | 80 W |
| RAM | 12 GB | 16 GB |
| Front camera | 12 MP | 16 MP |
| Pixel density | 501 ppi | 388 ppi |
| Battery capacity | 5000 mAh | 6150 mAh |
Between the Galaxy S25 Ultra and Z70 Ultra, the Galaxy S25 Ultra comes out ahead in main camera / pixel density, while the Z70 Ultra wins on wired charging / ram. Overall, the Galaxy S25 Ultra scores 73.3 and the Z70 Ultra scores 72.4 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (73.3 vs 72.4). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the Galaxy S25 Ultra if you photograph or shoot video regularly and want the better imaging pipeline of the two. The biggest gaps in its favor are main camera, pixel density, weight, among others. The single most decisive one: Main camera — 300.00% more. 200 MP vs 50 MP.
Pick the Z70 Ultra if you care most about wired charging / ram. Its strongest claims are wired charging, ram, front camera, among others. The single most decisive one: Wired charging — 77.78% more. 80 W vs 45 W.
Both ship with comparable 5g support, water resistance, optical image stabilization, 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: Samsung - Galaxy S25 Ultra or Nubia - Z70 Ultra?
Samsung - Galaxy S25 Ultra leads the current Mars Score by 0.9 points.The more useful decision is the trade-off behind that result: compare screen size, ram, pixel density, battery capacity against the way you will actually use the product.
Choose Samsung - Galaxy S25 Ultra if…
Samsung - Galaxy S25 Ultra has the measurable edge on main cam mp, pixel density ppi, weight g.
Choose Nubia - Z70 Ultra if…
Nubia - Z70 Ultra has the measurable edge on wired charging w, ram gb, front cam mp.
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 Samsung - Galaxy S25 Ultra wins
- ▲Main camera — 300.00% more. 200 MP vs 50 MP.
- ▲Pixel density — 29.12% more. 501 ppi vs 388 ppi.
- ▲Weight — 9.00 g less. 218 vs 227.
- ▲Screen size — 0.73% more. 6.9 " vs 6.85 ".
- ▲Promised OS updates: 7 (vs 3).
Why Nubia - Z70 Ultra wins
- ▲Wired charging — 77.78% more. 80 W vs 45 W.
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲Front camera — 33.33% more. 16 MP vs 12 MP.
- ▲Battery capacity — 23.00% more. 6150 mAh vs 5000 mAh.
- ▲AnTuTu — 22.79% more. 2640000 vs 2150000.
- ▲Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
Spec comparison
Design
| Spec | Samsung - Galaxy S25 Ultra | Nubia - Z70 Ultra |
|---|---|---|
| Weight | 218 glead | 227 g |
| Thickness | 8.2 mmlead | 8.7 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | Samsung - Galaxy S25 Ultra | Nubia - Z70 Ultra |
|---|---|---|
| Screen size | 6.9 "lead | 6.85 " |
| Pixel densityⓘ | 501 ppilead | 388 ppi |
| Refresh rateⓘ | 120 Hz | 144 Hzlead |
| Peak brightnessⓘ | 2600 nitslead | 2000 nits |
Performance
| Spec | Samsung - Galaxy S25 Ultra | Nubia - Z70 Ultra |
|---|---|---|
| RAMⓘ | 12 GB | 16 GBlead |
| Storageⓘ | 256 GB | 512 GBlead |
| AnTuTuⓘ | 2150000 | 2640000lead |
| CPU total clockⓘ | 21.4 GHz | 22.8 GHzlead |
Cameras
| Spec | Samsung - Galaxy S25 Ultra | Nubia - Z70 Ultra |
|---|---|---|
| Main cameraⓘ | 200 MPlead | 50 MP |
| Front camera | 12 MP | 16 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Samsung - Galaxy S25 Ultra | Nubia - Z70 Ultra |
|---|---|---|
| Battery capacityⓘ | 5000 mAh | 6150 mAhlead |
| Wired chargingⓘ | 45 W | 80 Wlead |
| Wireless chargingⓘ | 15 W | 15 W |
Connectivity
| Spec | Samsung - Galaxy S25 Ultra | Nubia - Z70 Ultra |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Samsung - Galaxy S25 Ultra | Nubia - Z70 Ultra |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 7 yearslead | 3 years |
Frequently asked
Which has better battery, Galaxy S25 Ultra or Z70 Ultra?+
Z70 Ultra has 23.0% more battery — 5000 mAh vs 6150 mAh.
Which is lighter, Galaxy S25 Ultra or Z70 Ultra?+
Galaxy S25 Ultra is 9g lighter — 218g vs 227g.
Is Galaxy S25 Ultra waterproof?+
Galaxy S25 Ultra has an IP68 rating.
Does Z70 Ultra support 5G?+
Yes, Z70 Ultra supports 5G.
Which has more RAM, Galaxy S25 Ultra or Z70 Ultra?+
Z70 Ultra offers 16GB of RAM.
Which has a better camera, Galaxy S25 Ultra or Z70 Ultra?+
Galaxy S25 Ultra has a 200 MP main camera vs 50 MP.