PhoneLifespan

X100 vs 15T

vs

Winner

Xiaomi 15T

Lifespan decides this one: the 15T is supported until Sep 2030 at $9.73 per month of safe use, while the X100 runs out in Nov 2028 ($21.17/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: X100 64 · 15T 70 — 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 $620
Buy with care$21.17/mo
2023◆ Buy-by Nov 20262028
Xiaomi 15T $500
Safe to buy$9.73/mo
2025◆ Buy-by Sep 20282030

Category by category

Display
X100 9015T 70

The X100's screen is the better one — 6.78-inch ltpo amoled, 2800x1260, 120hz, up to 3000 nits peak.

Performance
X100 9315T 78

The X100's MediaTek Dimensity 9300 is simply the faster chip.

Camera
X100 7915T 79

Camera systems are comparable on paper — pick by sample photos.

Battery
X100 8015T 90

5,500mAh vs 5,000mAh — the 15T lasts longer between charges.

Software longevity
X100 3515T 61

The 15T is supported until Sep 2030 — 22 months longer than the X100.

Value
X100 6415T 70

Overall value goes to the 15T at $9.73 per month of safe use.

Full spec table
SpecX10015T
Price (street)$620$500
Display6.78-inch LTPO AMOLED, 2800x1260, 120Hz, up to 3000 nits peak6.83-inch AMOLED, 2772x1280, 144Hz
ChipsetMediaTek Dimensity 9300MediaTek Dimensity 8400-Ultra
RAM12GB/16GB12GB
Storage256GB/512GB256GB/512GB
Battery5,000 mAh5,500 mAh
Charging120W wired67W wired
Rear cameras50MP main, 50MP ultra-wide, 64MP telephoto 3x periscope50MP main, 50MP telephoto 2x, 12MP ultra-wide
Dimensions164.1 × 75.3 × 8.2 mm163.2 × 78.0 × 7.5 mm
Weight202 g194 g
Water resistanceIP68IP68
Supported untilNov 2028Sep 2030
X100 full verdict →15T 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.