Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 15 Pro |
|---|---|---|
| Main camera | 200 MP | 50 MP |
| Wireless charging | 15 W | 50 W |
| Front camera | 12 MP | 32 MP |
| Wired charging | 45 W | 90 W |
| RAM | 12 GB | 16 GB |
| AnTuTu | 2150000 | 2710000 |
Between the Galaxy S25 Ultra and Xiaomi 15 Pro, the Galaxy S25 Ultra comes out ahead in main camera / screen size, while the Xiaomi 15 Pro wins on wireless charging / front camera. Overall, the Galaxy S25 Ultra scores 73.3 and the Xiaomi 15 Pro 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, screen size, promised os updates. The single most decisive one: Main camera — 300.00% more. 200 MP vs 50 MP.
Pick the Xiaomi 15 Pro if you care most about wireless charging / front camera. Its strongest claims are wireless charging, front camera, wired charging, among others. The single most decisive one: Wireless charging — 233.33% more. 50 W vs 15 W.
Both ship with comparable refresh rate, 5g support, water resistance, 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 Xiaomi 15 Pro?
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, screen size in, promised os years.
Choose Xiaomi 15 Pro if…
Xiaomi 15 Pro has the measurable edge on wireless charging w, front cam mp, wired charging w.
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.
- ▲Screen size — 2.53% more. 6.9 " vs 6.73 ".
- ▲Promised OS updates: 7 (vs 4).
Why Xiaomi 15 Pro wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲Front camera — 166.67% more. 32 MP vs 12 MP.
- ▲Wired charging — 100.00% more. 90 W vs 45 W.
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲AnTuTu — 26.05% more. 2710000 vs 2150000.
- ▲Battery capacity — 22.00% more. 6100 mAh vs 5000 mAh.
- ▲Weight — 5.00 g less. 213 vs 218.
- ▲Pixel density — 4.19% more. 522 ppi vs 501 ppi.
Spec comparison
Design
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 15 Pro |
|---|---|---|
| Weight | 218 g | 213 glead |
| Thickness | 8.2 mmlead | 8.4 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 15 Pro |
|---|---|---|
| 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
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 15 Pro |
|---|---|---|
| RAMⓘ | 12 GB | 16 GBlead |
| Storageⓘ | 256 GB | 512 GBlead |
| AnTuTuⓘ | 2150000 | 2710000lead |
| CPU total clockⓘ | 21.4 GHz | 22.8 GHzlead |
Cameras
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 15 Pro |
|---|---|---|
| Main cameraⓘ | 200 MPlead | 50 MP |
| Front camera | 12 MP | 32 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 15 Pro |
|---|---|---|
| Battery capacityⓘ | 5000 mAh | 6100 mAhlead |
| Wired chargingⓘ | 45 W | 90 Wlead |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 15 Pro |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Samsung - Galaxy S25 Ultra | Xiaomi 15 Pro |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 7 yearslead | 4 years |
Frequently asked
Which has better battery, Galaxy S25 Ultra or Xiaomi 15 Pro?+
Xiaomi 15 Pro has 22.0% more battery — 5000 mAh vs 6100 mAh.
Which is lighter, Galaxy S25 Ultra or Xiaomi 15 Pro?+
Xiaomi 15 Pro is 5g lighter — 218g vs 213g.
Is Galaxy S25 Ultra waterproof?+
Galaxy S25 Ultra has an IP68 rating.
Does Xiaomi 15 Pro support 5G?+
Yes, Xiaomi 15 Pro supports 5G.
Which has more RAM, Galaxy S25 Ultra or Xiaomi 15 Pro?+
Xiaomi 15 Pro offers 16GB of RAM.
Which has a better camera, Galaxy S25 Ultra or Xiaomi 15 Pro?+
Galaxy S25 Ultra has a 200 MP main camera vs 50 MP.