13 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 13 runs out in Dec 2027 ($22.19/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 13 64 · 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 $400

Buy with care$22.19/mo

2022◆ Buy-by Dec 20252027

Xiaomi 15 Ultra $1350

Safe to buy$30.26/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

13 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

13 8515 Ultra 98

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

Camera

13 7915 Ultra 96

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

Battery

13 7015 Ultra 88

5,410mAh vs 4,500mAh — the 15 Ultra lasts longer between charges.

Software longevity

13 2115 Ultra 53

The 15 Ultra is supported until Mar 2030 — 27 months longer than the 13.

Value

13 6415 Ultra 65

Pound for pound, these two are equally good deals.

Full spec table

Spec	13	15 Ultra
Price (street)	$400	$1350
Display	6.36-inch AMOLED, 2400 x 1080, 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	8GB/12GB	16GB
Storage	128GB/256GB/512GB	512GB/1TB
Battery	4,500 mAh	5,410 mAh
Charging	67W wired, 50W wireless	90W wired, 80W wireless
Rear cameras	50MP main, 12MP ultra-wide, 10MP telephoto 3.2x	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions	152.8 × 71.5 × 8.0 mm	161.3 × 75.3 × 9.35 mm
Weight	189 g	226 g
Water resistance	IP68	IP68
Supported until	Dec 2027	Mar 2030

13 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.