X100 Ultra vs 15 Pro

Phone 1

Phone 2

Winner

Xiaomi 15 Pro

Lifespan decides this one: the 15 Pro is supported until Oct 2030 at $12.41 per month of safe use, while the X100 Ultra runs out in May 2029 ($20.39/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: X100 Ultra 66 · 15 Pro 74 — methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Vivo X100 Ultra $720

Buy with care$20.39/mo

2024◆ Buy-by May 20272029

Xiaomi 15 Pro $650

Safe to buy$12.41/mo

2024◆ Buy-by Oct 20282030

Category by category

Display

X100 Ultra 9015 Pro 90

Both displays are effectively the same class.

Performance

X100 Ultra 9215 Pro 98

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

Camera

X100 Ultra 8415 Pro 79

The X100 Ultra has the stronger camera system — same lens count, higher-grade sensors.

Battery

X100 Ultra 9015 Pro 100

6,100mAh vs 5,500mAh — the 15 Pro lasts longer between charges.

Software longevity

X100 Ultra 4215 Pro 62

The 15 Pro is supported until Oct 2030 — 17 months longer than the X100 Ultra.

Value

X100 Ultra 6615 Pro 74

Overall value goes to the 15 Pro at $12.41 per month of safe use.

Full spec table

Spec	X100 Ultra	15 Pro
Price (street)	$720	$650
Display	6.78-inch LTPO AMOLED, 120Hz, 3000 nits peak	6.73-inch LTPO AMOLED, 3200 x 1440, 120Hz
Chipset	Snapdragon 8 Gen 3	Qualcomm Snapdragon 8 Elite
RAM	12GB/16GB	12GB/16GB
Storage	256GB/512GB/1TB	256GB/512GB/1TB
Battery	5,500 mAh	6,100 mAh
Charging	80W wired, 30W wireless	90W wired, 50W wireless
Rear cameras	50MP main, 200MP periscope telephoto, 50MP ultra-wide	50MP main, 50MP ultra-wide, 50MP telephoto 5x
Dimensions	164.1 x 75.6 x 9.2 mm	161.3 × 74.6 × 8.4 mm
Weight	229 g	213 g
Water resistance	IP68/IP69	IP68
Supported until	May 2029	Oct 2030

X100 Ultra full verdict →15 Pro 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.