Between the Galaxy S25 Ultra and Xiaomi 16 Ultra, the Galaxy S25 Ultra comes out ahead in main camera and weight, while the Xiaomi 16 Ultra wins on wireless charging and front camera. Overall, the Galaxy S25 Ultra scores 73.9 and the Xiaomi 16 Ultra scores 74.3 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (73.9 vs 74.3). The decision isn't about overall quality — both clear the bar — it's 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, weight, screen size, among others.
Pick the Xiaomi 16 Ultra if you photograph or shoot video regularly and want the better imaging pipeline of the two. Its strongest claims are wireless charging, front camera, wired charging, among others.
Both ship with comparable refresh rate, 5g support, water resistance, 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 Samsung - Galaxy S25 Ultra wins
- ▲Main camera — 300.00% more. 200 MP vs 50 MP.
- ▲Weight — 11.00 g less. 218 vs 229.
- ▲Screen size — 2.53% more. 6.9 " vs 6.73 ".
- ▲Promised OS updates: 7 (vs 5).
Why Xiaomi 16 Ultra wins
- ▲Wireless charging — 433.33% more. 80 W vs 15 W.
- ▲Front camera — 166.67% more. 32 MP vs 12 MP.
- ▲Wired charging — 122.22% more. 100 W vs 45 W.
- ▲AnTuTu — 37.21% more. 2950000 vs 2150000.
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲Battery capacity — 20.00% more. 6000 mAh vs 5000 mAh.
- ▲Pixel density — 4.19% more. 522 ppi vs 501 ppi.
Spec comparison
Design
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| Weight | 218 glead | 229 g |
| Thickness | 8.2 mmlead | 9.2 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| Screen sizeⓘ | 6.9 "lead | 6.73 " |
| Pixel densityⓘ | 501 ppi | 522 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 2600 nits | 3200 nitslead |
Performance
Cameras
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| Main cameraⓘ | 200 MPlead | 50 MP |
| Front camera | 12 MP | 32 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| Battery capacity | 5000 mAh | 6000 mAhlead |
| Wired chargingⓘ | 45 W | 100 Wlead |
| Wireless chargingⓘ | 15 W | 80 Wlead |
Connectivity
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 7 yearslead | 5 years |
Frequently asked
Which has better battery, Galaxy S25 Ultra or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra has 20.0% more battery — 5000 mAh vs 6000 mAh.
Which is lighter, Galaxy S25 Ultra or Xiaomi 16 Ultra?+
Galaxy S25 Ultra is 11g lighter — 218g vs 229g.
Is Galaxy S25 Ultra waterproof?+
Galaxy S25 Ultra has an IP68 rating.
Does Xiaomi 16 Ultra support 5G?+
Yes, Xiaomi 16 Ultra supports 5G.
Which has more RAM, Galaxy S25 Ultra or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra offers 16GB of RAM.
Which has a better camera, Galaxy S25 Ultra or Xiaomi 16 Ultra?+
Galaxy S25 Ultra has a 200 MP main camera vs 50 MP.
Spec-level deep dives
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