Between the Galaxy S25 Ultra and ROG Phone 9 Pro, the Galaxy S25 Ultra comes out ahead in main camera and pixel density, while the ROG Phone 9 Pro wins on front camera and ram. Overall, the Galaxy S25 Ultra scores 73.9 and the ROG Phone 9 Pro scores 77.7 on our Mars Score.
Which should you buy?
The ROG Phone 9 Pro edges ahead on the Mars Score (73.9 vs 77.7), but the 3.8-point gap is small enough that the right pick comes down to which spec advantages matter to you.
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.
Pick the ROG Phone 9 Pro if you photograph or shoot video regularly and want the better imaging pipeline of the two. Its strongest claims are front camera, ram, refresh rate, among others.
Both ship with comparable 5g support, water resistance, optical image stabilization, 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.
- ▲Pixel density — 29.12% more. 501 ppi vs 388 ppi.
- ▲Weight — 9.00 g less. 218 vs 227.
- ▲Screen size — 1.77% more. 6.9 " vs 6.78 ".
- ▲Promised OS updates: 7 (vs 3).
Why ASUS - ROG Phone 9 Pro wins
- ▲Front camera — 166.67% more. 32 MP vs 12 MP.
- ▲RAM — 100.00% more. 24 GB vs 12 GB.
- ▲Refresh rate — 54.17% more. 185 Hz vs 120 Hz.
- ▲Wired charging — 44.44% more. 65 W vs 45 W.
- ▲AnTuTu — 24.65% more. 2680000 vs 2150000.
- ▲Battery capacity — 16.00% more. 5800 mAh vs 5000 mAh.
- ▲Has Headphone jack.
Spec comparison
Design
| Spec | Samsung - Galaxy S25 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Weight | 218 glead | 227 g |
| Thickness | 8.2 mmlead | 8.9 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | Samsung - Galaxy S25 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Screen sizeⓘ | 6.9 "lead | 6.78 " |
| Pixel densityⓘ | 501 ppilead | 388 ppi |
| Refresh rateⓘ | 120 Hz | 185 Hzlead |
| Peak brightnessⓘ | 2600 nitslead | 2500 nits |
Performance
Cameras
| Spec | Samsung - Galaxy S25 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Main cameraⓘ | 200 MPlead | 50 MP |
| Front camera | 12 MP | 32 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Samsung - Galaxy S25 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Battery capacity | 5000 mAh | 5800 mAhlead |
| Wired chargingⓘ | 45 W | 65 Wlead |
| Wireless chargingⓘ | 15 W | 15 W |
Connectivity
| Spec | Samsung - Galaxy S25 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | truelead |
| microSD slot | false | false |
Operating System
| Spec | Samsung - Galaxy S25 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 7 yearslead | 3 years |
Frequently asked
Which has better battery, Galaxy S25 Ultra or ROG Phone 9 Pro?+
ROG Phone 9 Pro has 16.0% more battery — 5000 mAh vs 5800 mAh.
Which is lighter, Galaxy S25 Ultra or ROG Phone 9 Pro?+
Galaxy S25 Ultra is 9g lighter — 218g vs 227g.
Is Galaxy S25 Ultra waterproof?+
Galaxy S25 Ultra has an IP68 rating.
Does ROG Phone 9 Pro support 5G?+
Yes, ROG Phone 9 Pro supports 5G.
Which has more RAM, Galaxy S25 Ultra or ROG Phone 9 Pro?+
ROG Phone 9 Pro offers 24GB of RAM.
Which has a better camera, Galaxy S25 Ultra or ROG Phone 9 Pro?+
Galaxy S25 Ultra has a 200 MP main camera vs 50 MP.
Spec-level deep dives
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