15 Ultra vs 15T

Phone 1

Phone 2

Winner

Xiaomi 15T

Lifespan decides this one: the 15T is supported until Sep 2030 at $9.73 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: 15 Ultra 65 · 15T 70 — methodology

The lifespan decider

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

Xiaomi 15 Ultra $1350

Safe to buy$30.27/mo

2025◆ Buy-by Mar 20282030

Xiaomi 15T $500

Safe to buy$9.73/mo

2025◆ Buy-by Sep 20282030

Category by category

Display

15 Ultra 10015T 70

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

15 Ultra 9815T 78

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

Camera

15 Ultra 9615T 79

The 15 Ultra has the stronger camera system (4 real rear lenses vs 3).

Battery

15 Ultra 8815T 90

Battery capacities are close enough not to decide this.

Software longevity

15 Ultra 5315T 61

The 15T is supported until Sep 2030 — 7 months longer than the 15 Ultra.

Value

15 Ultra 6515T 70

Overall value goes to the 15T at $9.73 per month of safe use.

Full spec table

Spec	15 Ultra	15T
Price (street)	$1350	$500
Display	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak	6.83-inch AMOLED, 2772x1280, 144Hz
Chipset	Qualcomm Snapdragon 8 Elite (3nm)	MediaTek Dimensity 8400-Ultra
RAM	16GB	12GB
Storage	512GB/1TB	256GB/512GB
Battery	5,410 mAh	5,500 mAh
Charging	90W wired, 80W wireless	67W wired
Rear cameras	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto	50MP main, 50MP telephoto 2x, 12MP ultra-wide
Dimensions	161.3 × 75.3 × 9.35 mm	163.2 × 78.0 × 7.5 mm
Weight	226 g	194 g
Water resistance	IP68	IP68
Supported until	Mar 2030	Sep 2030

15 Ultra full verdict →15T 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.