ROG Phone 8 Pro Edition vs 15 Ultra

Phone 1

Phone 2

Winner

Xiaomi 15 Ultra

Lifespan decides this one: the 15 Ultra is supported until Mar 2030 at $30.36 per month of safe use, while the ROG Phone 8 Pro Edition runs out in Mar 2028 ($57.77/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: ROG Phone 8 Pro Edition 53 · 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.

Asus ROG Phone 8 Pro Edition $1200

Buy with care$57.77/mo

2024◆ Buy-by Mar 20262028

Xiaomi 15 Ultra $1350

Safe to buy$30.36/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

ROG Phone 8 Pro Edition 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

ROG Phone 8 Pro Edition 9215 Ultra 98

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

Camera

ROG Phone 8 Pro Edition 7915 Ultra 96

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

Battery

ROG Phone 8 Pro Edition 9015 Ultra 88

Battery capacities are close enough not to decide this.

Software longevity

ROG Phone 8 Pro Edition 2515 Ultra 53

The 15 Ultra is supported until Mar 2030 — 24 months longer than the ROG Phone 8 Pro Edition.

Value

ROG Phone 8 Pro Edition 5315 Ultra 65

Overall value goes to the 15 Ultra at $30.36 per month of safe use.

Full spec table

Spec	ROG Phone 8 Pro Edition	15 Ultra
Price (street)	$1200	$1350
Display	6.78-inch LTPO AMOLED, FHD+, 165Hz, Gorilla Glass Victus 2	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
Chipset	Qualcomm Snapdragon 8 Gen 3 (4nm)	Qualcomm Snapdragon 8 Elite (3nm)
RAM	24GB	16GB
Storage	1TB	512GB/1TB
Battery	5,500 mAh	5,410 mAh
Charging	65W wired, 15W wireless	90W wired, 80W wireless
Rear cameras	50MP main, 32MP telephoto, 13MP ultra-wide	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions	163.8 × 76.8 × 8.9 mm	161.3 × 75.3 × 9.35 mm
Weight	225 g	226 g
Water resistance	IP68	IP68
Supported until	Mar 2028	Mar 2030

ROG Phone 8 Pro Edition 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.