Samsung
Samsung Galaxy S25 Ultra
$1299.99
Released 2025-02
Best Smartphones · head-to-head
Samsung Galaxy S25 Ultra vs Xiaomi 15
A sourced, side-by-side comparison. Samsung Galaxy S25 Ultra is cheaper at $1299.99. Every spec and price links to its source.
Xiaomi
Xiaomi 15
—
Released 2025-03
Which is better: the Samsung Galaxy S25 Ultra or Xiaomi 15?
The Xiaomi 15 wins 2 of the 3 specs we compare head to head; the other wins 1.
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Key specs, head to head
The numbers that decide it, drawn to scale — longer bar wins, the accent bar is the stronger figure.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Samsung Galaxy S25 Ultra | Xiaomi 15 |
|---|---|---|
| US price | $1299.99 MSRP, 256GB (base config) | — |
| Brand | Samsung | Xiaomi |
| Released | 2025-02 | 2025-03 |
| Display (in) | 6.9 | 6.36 |
| Display type | Dynamic LTPO AMOLED 2X | LTPO OLED |
| Refresh (Hz) | 120 | 120 |
| Chipset | Qualcomm Snapdragon 8 Elite for Galaxy | Qualcomm Snapdragon 8 Elite |
| RAM (GB) | 12 | 12 |
| Storage (GB) | 256 | 256 |
| Main camera (MP) | 200 | 50 |
| Battery (mAh) | 5000 | 5240 |
| Charge (W) | 45 | 90 |
| Weight (g) | 218 | 191 |
| OS | Android 15 | Android 15 |
| IP rating | IP68 | IP68 |
| Fiveg | Yes | Yes |
Sources — Samsung Galaxy S25 Ultra: gsmarena.com (verified 2026-06-15). Xiaomi 15: gsmarena.com (verified 2026-06-15).
What's the difference between the Samsung Galaxy S25 Ultra and Xiaomi 15?
Where the two actually differ on the specs we track (7 of 13). Matching specs are omitted.
- Display (in): Samsung Galaxy S25 Ultra 6.9 vs Xiaomi 15 6.36
- Display type: Samsung Galaxy S25 Ultra Dynamic LTPO AMOLED 2X vs Xiaomi 15 LTPO OLED
- Chipset: Samsung Galaxy S25 Ultra Qualcomm Snapdragon 8 Elite for Galaxy vs Xiaomi 15 Qualcomm Snapdragon 8 Elite
- Main camera (MP): Samsung Galaxy S25 Ultra 200 vs Xiaomi 15 50
- Battery (mAh): Samsung Galaxy S25 Ultra 5000 vs Xiaomi 15 5240
- Charge (W): Samsung Galaxy S25 Ultra 45 vs Xiaomi 15 90
- Weight (g): Samsung Galaxy S25 Ultra 218 vs Xiaomi 15 191
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Samsung Galaxy S25 Ultra
Two whitelisted lab testers (Tom's Guide, GSMArena) reviewed the exact Galaxy S25 Ultra. Both praise the overclocked Snapdragon 8 Elite speed, and Tom's Guide measured strong battery endurance (17h14m). Display measurements diverge by methodology. Both flag the slow 45W charging (~59 min to full); GSMArena calls the panel solid but not cutting-edge, while Tom's Guide rates the display excellent and brighter than the iPhone 16 Pro Max. (2 sourced reviews, 2 lab-tested.)
Praised: Fast overclocked Snapdragon 8 Elite performance, one of the fastest phones tested; Excellent, bright display beating iPhone 16 Pro Max in Tom's Guide lab (1,860 nits); Strong battery endurance (17h14m Tom's Guide test).
Flagged: Slow 45W charging, ~59 minutes to full; Qi2 support lacks built-in magnets; needs a special case; Display is solid but not cutting-edge per spec / dims quickly at peak.
Xiaomi 15
No sourced tester review yet.