PhoneLifespan

Mate X6 vs 15 Ultra

vs

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 Mate X6 runs out in Dec 2028 ($57.19/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Mate X6 51 · 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.

Huawei Mate X6 $1700
Buy with care$57.19/mo
2024◆ Buy-by Dec 20262028
Xiaomi 15 Ultra $1350
Safe to buy$30.26/mo
2025◆ Buy-by Mar 20282030

Category by category

Display
Mate X6 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
Mate X6 8515 Ultra 98

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

Camera
Mate X6 7915 Ultra 96

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

Battery
Mate X6 8215 Ultra 88

5,410mAh vs 5,110mAh — the 15 Ultra lasts longer between charges.

Software longevity
Mate X6 3515 Ultra 53

The 15 Ultra is supported until Mar 2030 — 15 months longer than the Mate X6.

Value
Mate X6 5115 Ultra 65

Overall value goes to the 15 Ultra at $30.26 per month of safe use.

Full spec table
SpecMate X615 Ultra
Price (street)$1700$1350
Display7.93-inch foldable LTPO OLED main (2440x2240, 120Hz) + 6.45-inch LTPO OLED cover (120Hz)6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
ChipsetHiSilicon Kirin 9020Qualcomm Snapdragon 8 Elite (3nm)
RAM12GB/16GB16GB
Storage256GB/512GB/1TB512GB/1TB
Battery5,110 mAh5,410 mAh
Charging66W wired, 50W wireless, reverse wireless90W wired, 80W wireless
Rear cameras50MP main (variable aperture f/1.0-4.0, OIS), 40MP ultra-wide, 48MP telephoto 4x periscope OIS50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
DimensionsUnfolded 156.0 × 144.1 × 4.6 mm; folded 156.0 × 73.7 × 9.85 mm161.3 × 75.3 × 9.35 mm
Weight239 g226 g
Water resistanceIP68/IP69IP68
Supported untilDec 2028Mar 2030
Mate X6 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.