13T 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 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 · 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 13T $350

Buy with care$12.75/mo

2023◆ Buy-by Sep 20262028

Xiaomi 15T $500

Safe to buy$9.73/mo

2025◆ Buy-by Sep 20282030

Category by category

Display

13T 7015T 70

Both displays are effectively the same class.

Performance

13T 7515T 78

Performance is a wash — same chip tier.

Camera

13T 7915T 79

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

Battery

13T 8015T 90

5,500mAh vs 5,000mAh — the 15T lasts longer between charges.

Software longevity

13T 3315T 61

The 15T is supported until Sep 2030 — 24 months longer than the 13T.

Value

13T 6915T 70

Pound for pound, these two are equally good deals.

Full spec table

Spec	13T	15T
Price (street)	$350	$500
Display	6.67-inch AMOLED, 2712 x 1220, 144Hz	6.83-inch AMOLED, 2772x1280, 144Hz
Chipset	MediaTek Dimensity 8200 Ultra	MediaTek Dimensity 8400-Ultra
RAM	8GB/12GB	12GB
Storage	256GB	256GB/512GB
Battery	5,000 mAh	5,500 mAh
Charging	67W wired	67W wired
Rear cameras	50MP main, 12MP ultra-wide, 50MP telephoto 2x	50MP main, 50MP telephoto 2x, 12MP ultra-wide
Dimensions	162.2 × 75.7 × 8.5 mm	163.2 × 78.0 × 7.5 mm
Weight	197 g	194 g
Water resistance	IP68	IP68
Supported until	Sep 2028	Sep 2030

13T 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.