14 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 14 runs out in Feb 2029 ($17.05/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 14 65 · 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 14 $550

Buy with care$17.05/mo

2024◆ Buy-by Feb 20272029

Xiaomi 15 Ultra $1350

Safe to buy$30.40/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

14 8015 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

14 9215 Ultra 98

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

Camera

14 7915 Ultra 96

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

Battery

14 7215 Ultra 88

5,410mAh vs 4,610mAh — the 15 Ultra lasts longer between charges.

Software longevity

14 3815 Ultra 53

The 15 Ultra is supported until Mar 2030 — 12 months longer than the 14.

Value

14 6515 Ultra 65

Pound for pound, these two are equally good deals.

Full spec table

Spec	14	15 Ultra
Price (street)	$550	$1350
Display	6.36-inch LTPO AMOLED, 2670×1200 (460 ppi), 1–120Hz, 1000 nits typical / up to 3000 nits peak	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
Chipset	Snapdragon 8 Gen 3	Qualcomm Snapdragon 8 Elite (3nm)
RAM	12GB	16GB
Storage	256GB/512GB	512GB/1TB
Battery	4,610 mAh	5,410 mAh
Charging	90W wired, 50W wireless	90W wired, 80W wireless
Rear cameras	50MP main (Leica Summilux, f/1.6, OIS), 50MP ultra-wide (115° FOV), 50MP telephoto (Leica 75mm floating, OIS)	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions	152.8 × 71.5 × 8.2 mm	161.3 × 75.3 × 9.35 mm
Weight	193 g	226 g
Water resistance	IP68	IP68
Supported until	Feb 2029	Mar 2030

14 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.