13T vs 15 Ultra

Phone 1

Phone 2

Winner

Xiaomi 15 Ultra

Lifespan decides this one: the 15 Ultra is supported until Mar 2030 at $30.26 per month of safe use, while the 13T runs out in Sep 2028 ($12.75/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 13T 69 · 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 13T $350

Buy with care$12.75/mo

2023◆ Buy-by Sep 20262028

Xiaomi 15 Ultra $1350

Safe to buy$30.26/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

13T 7015 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

13T 7515 Ultra 98

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

Camera

13T 7915 Ultra 96

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

Battery

13T 8015 Ultra 88

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

Software longevity

13T 3315 Ultra 53

The 15 Ultra is supported until Mar 2030 — 17 months longer than the 13T.

Value

13T 6915 Ultra 65

Overall value goes to the 13T at $12.75 per month of safe use.

Full spec table

Spec	13T	15 Ultra
Price (street)	$350	$1350
Display	6.67-inch AMOLED, 2712 x 1220, 144Hz	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
Chipset	MediaTek Dimensity 8200 Ultra	Qualcomm Snapdragon 8 Elite (3nm)
RAM	8GB/12GB	16GB
Storage	256GB	512GB/1TB
Battery	5,000 mAh	5,410 mAh
Charging	67W wired	90W wired, 80W wireless
Rear cameras	50MP main, 12MP ultra-wide, 50MP telephoto 2x	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions	162.2 × 75.7 × 8.5 mm	161.3 × 75.3 × 9.35 mm
Weight	197 g	226 g
Water resistance	IP68	IP68
Supported until	Sep 2028	Mar 2030

13T 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.