13 Ultra vs 15 Ultra

Phone 1

Phone 2

Winner

Xiaomi 15 Ultra

Lifespan decides this one: the 15 Ultra is supported until Mar 2030 at $30.40 per month of safe use, while the 13 Ultra runs out in Apr 2028 ($29.59/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 13 Ultra 62 · 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.

Xiaomi 13 Ultra $650

Buy with care$29.59/mo

2023◆ Buy-by Apr 20262028

Xiaomi 15 Ultra $1350

Safe to buy$30.40/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

13 Ultra 9015 Ultra 100

The 15 Ultra's screen is the better one — 6.73-inch 2k (1440×3200) ltpo amoled, 1–120hz, up to 3200 nits peak.

Performance

13 Ultra 8515 Ultra 98

The 15 Ultra's Qualcomm Snapdragon 8 Elite (3nm) is simply the faster chip.

Camera

13 Ultra 9115 Ultra 96

The 15 Ultra has the stronger camera system — same lens count, higher-grade sensors.

Battery

13 Ultra 8015 Ultra 88

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

Software longevity

13 Ultra 2615 Ultra 53

The 15 Ultra is supported until Mar 2030 — 22 months longer than the 13 Ultra.

Value

13 Ultra 6215 Ultra 65

Pound for pound, these two are equally good deals.

Full spec table

Spec	13 Ultra	15 Ultra
Price (street)	$650	$1350
Display	6.73-inch LTPO AMOLED, 3200 x 1440, 120Hz	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
Chipset	Qualcomm Snapdragon 8 Gen 2	Qualcomm Snapdragon 8 Elite (3nm)
RAM	12GB/16GB	16GB
Storage	256GB/512GB/1TB	512GB/1TB
Battery	5,000 mAh	5,410 mAh
Charging	90W wired, 50W wireless	90W wired, 80W wireless
Rear cameras	50MP main, 50MP ultra-wide, 50MP telephoto 3.2x, 50MP periscope telephoto 5x	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions	163.2 × 74.6 × 9.1 mm	161.3 × 75.3 × 9.35 mm
Weight	227 g	226 g
Water resistance	IP68	IP68
Supported until	Apr 2028	Mar 2030

13 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.