Samsung Galaxy S25 UltravsXiaomi 15 Ultra
SETTLEDUpdated September 8, 2026
Xiaomi 15 Ultra wins
Verdict
Xiaomi 15 Ultra wins 4 of 5 categories — our overall pick
Xiaomi 15 Ultra is the overall winner, 4 / 5 — performance is its standout. It costs USD 1,399 — USD 100 more than the Samsung Galaxy S25 Ultra. Pay the premium if performance is your priority.
- Xiaomi 15 Ultra takes Performance — led by storage (512 GB).
- Xiaomi 15 Ultra takes Display — led by peak brightness (3,200 nits).
- Xiaomi 15 Ultra takes Camera — led by selfie camera (32 MP).
- Xiaomi 15 Ultra takes Battery — led by charging speed (90 W).
- Samsung Galaxy S25 Ultra takes Price — led by price (1,299 USD).
Scores follow our published methodology · v2026.09
In plain English
Choose Samsung Galaxy S25 Ultra if you want…
- Choose Samsung Galaxy S25 Ultra if you want a bigger screen — 6.9 in vs 6.73 in.
- Choose Samsung Galaxy S25 Ultra if you want a lower price — 1,299 USD vs 1,399 USD.
Choose Xiaomi 15 Ultra if you want…
- Choose Xiaomi 15 Ultra if you want a faster phone for apps and games — 2,500,000 pts vs 2,200,000 pts.
- Choose Xiaomi 15 Ultra if you want more apps open at once — 16 GB vs 12 GB.
- Choose Xiaomi 15 Ultra if you want more room for photos and apps — 512 GB vs 256 GB.
- Choose Xiaomi 15 Ultra if you want a sharper screen — 522 ppi vs 505 ppi.
- Choose Xiaomi 15 Ultra if you want a screen you can read in sunlight — 3,200 nits vs 2,600 nits.
- Choose Xiaomi 15 Ultra if you want sharper selfies — 32 MP vs 12 MP.
- Choose Xiaomi 15 Ultra if you want a better camera — 155 pts vs 146 pts.
- Choose Xiaomi 15 Ultra if you want longer battery life — 5,410 mAh vs 5,000 mAh.
- Choose Xiaomi 15 Ultra if you want faster charging — 90 W vs 45 W.
At a glance
- Samsung Galaxy S25 Ultra
- Xiaomi 15 Ultra
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Full record
Every spec, side by side — winners get a check and a proportional bar. Ties share the badge.
Performance score
Approximate benchmark score of the chipset — higher is faster for apps, games and AI.
Chipset
The processor inside — shown for reference, never decides a winner.
RAM
More RAM keeps more apps alive in the background.
Storage
Base onboard storage for photos, apps and media.
Screen size
Diagonal screen size — bigger is better for media, smaller is easier to hold.
Pixel density
Sharpness of the screen — above ~400 ppi looks crisp.
Refresh rate
How smooth scrolling and motion feel. 120 Hz is the modern standard.
Peak brightness
Peak brightness in sunlight — higher stays readable outdoors.
Main camera
Resolution of the primary rear camera — photo quality is judged by the Camera quality score, not megapixels.
Selfie camera
Resolution of the front camera.
Telephoto
A dedicated zoom lens for distant subjects without quality loss.
Video score
Composite video rating — stabilisation, 4K/8K support and colour.
Camera score
Composite camera quality from independent testing — how good the photos actually are.
Battery
Battery capacity — higher generally lasts longer.
Charging speed
Wired charging speed — higher refills faster.
Wireless charging
Whether the phone charges wirelessly.
Price
Typical MSRP in US dollars — lower is better value.
Which one should you buy?
Samsung Galaxy S25 Ultra
Choose Samsung Galaxy S25 Ultra if price matters most. It costs USD 1,299, the lowest price in this group.
Xiaomi 15 Ultra
Choose Xiaomi 15 Ultra if performance matters most — it wins the most categories overall. It costs USD 1,399.
Pros & cons
Samsung Galaxy S25 Ultra
- Class-leading performance
- 200 MP main camera with dual telephoto
- S Pen built in
- Very expensive
- Heavy at 218 g
- 45 W charging trails rivals
Xiaomi 15 Ultra
- Best-in-class zoom
- Elite chipset
- 5,410 mAh + 90 W
- Very expensive
- Heavy
- Software bloat