Galaxy S25 Ultra vs 15 Ultra

Phone 1

Phone 2

Winner

Samsung Galaxy S25 Ultra

Lifespan decides this one: the Galaxy S25 Ultra is supported until Feb 2032 at $13.30 per month of safe use, while the 15 Ultra runs out in Mar 2030 ($30.27/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Galaxy S25 Ultra 75 · 15 Ultra 65 — methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Samsung Galaxy S25 Ultra $902

Safe to buy$13.30/mo

2025◆ Buy-by Feb 20302032

Xiaomi 15 Ultra $1350

Safe to buy$30.27/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

Galaxy S25 Ultra 10015 Ultra 100

Both displays are effectively the same class.

Performance

Galaxy S25 Ultra 9815 Ultra 98

Performance is a wash — same chip tier.

Camera

Galaxy S25 Ultra 9615 Ultra 96

Camera systems are comparable on paper — pick by sample photos.

Battery

Galaxy S25 Ultra 8015 Ultra 88

5,410mAh vs 5,000mAh — the 15 Ultra lasts longer between charges.

Software longevity

Galaxy S25 Ultra 8115 Ultra 53

The Galaxy S25 Ultra is supported until Feb 2032 — 23 months longer than the 15 Ultra.

Value

Galaxy S25 Ultra 7515 Ultra 65

Overall value goes to the Galaxy S25 Ultra at $13.30 per month of safe use.

Full spec table

Spec	Galaxy S25 Ultra	15 Ultra
Price (street)	$902	$1350
Display	6.9-inch Dynamic LTPO AMOLED 2X, QHD+, 1–120Hz, up to 2600 nits	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
Chipset	Snapdragon 8 Elite for Galaxy	Qualcomm Snapdragon 8 Elite (3nm)
RAM	12GB	16GB
Storage	256GB/512GB/1TB	512GB/1TB
Battery	5,000 mAh	5,410 mAh
Charging	45W wired (65% in 30 min), 15W wireless (Qi2 Ready), 4.5W reverse wireless	90W wired, 80W wireless
Rear cameras	200MP main, 50MP ultra-wide, 10MP telephoto 3x, 50MP periscope 5x	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions	162.8 × 77.6 × 8.2 mm	161.3 × 75.3 × 9.35 mm
Weight	218 g	226 g
Water resistance	IP68	IP68
Supported until	Feb 2032	Mar 2030

Galaxy S25 Ultra full verdict →15 Ultra full verdict →Longevity master board →

Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.