14 Ultra vs 15

Phone 1

Phone 2

Winner

Xiaomi 15

Lifespan decides this one: the 15 is supported until Mar 2030 at $16.89 per month of safe use, while the 14 Ultra runs out in Feb 2029 ($23.33/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 14 Ultra 64 · 15 67 — 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 Ultra $750

Buy with care$23.33/mo

2024◆ Buy-by Feb 20272029

Xiaomi 15 $750

Safe to buy$16.89/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

14 Ultra 9015 90

Both displays are effectively the same class.

Performance

14 Ultra 9215 98

The 15's Snapdragon 8 Elite is simply the faster chip.

Camera

14 Ultra 9115 79

The 14 Ultra has the stronger camera system (4 real rear lenses vs 3).

Battery

14 Ultra 8015 85

5,240mAh vs 5,000mAh — the 15 lasts longer between charges.

Software longevity

14 Ultra 3815 53

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

Value

14 Ultra 6415 67

Pound for pound, these two are equally good deals.

Full spec table

Spec	14 Ultra	15
Price (street)	$750	$750
Display	6.73-inch LTPO AMOLED, 3200 x 1440, 120Hz	6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+
Chipset	Qualcomm Snapdragon 8 Gen 3	Snapdragon 8 Elite
RAM	12GB/16GB	12GB
Storage	256GB/512GB/1TB	256GB/512GB
Battery	5,000 mAh	5,240 mAh
Charging	90W wired, 80W wireless	90W wired, 50W wireless
Rear cameras	50MP main, 50MP ultra-wide, 50MP telephoto 3.2x, 50MP periscope telephoto 5x	50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions	161.4 × 75.3 × 9.2 mm	152.3 × 71.2 × 8.08 mm
Weight	220 g	191 g
Water resistance	IP68	IP68
Supported until	Feb 2029	Mar 2030

14 Ultra full verdict →15 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.