PhoneLifespan

X100 vs 15T Pro

vs

Winner

Xiaomi 15T Pro

Lifespan decides this one: the 15T Pro is supported until Sep 2030 at $12.65 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 Pro 69 — 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 Pro $650
Safe to buy$12.65/mo
2025◆ Buy-by Sep 20282030

Category by category

Display
X100 9015T Pro 70

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

Performance
X100 9315T Pro 94

Performance is a wash — same chip tier.

Camera
X100 7915T Pro 79

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

Battery
X100 8015T Pro 90

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

Software longevity
X100 3515T Pro 61

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

Value
X100 6415T Pro 69

Overall value goes to the 15T Pro at $12.65 per month of safe use.

Full spec table
SpecX10015T Pro
Price (street)$620$650
Display6.78-inch LTPO AMOLED, 2800x1260, 120Hz, up to 3000 nits peak6.83-inch AMOLED, 2772x1280, 144Hz
ChipsetMediaTek Dimensity 9300MediaTek Dimensity 9400+
RAM12GB/16GB12GB
Storage256GB/512GB256GB/512GB/1TB
Battery5,000 mAh5,500 mAh
Charging120W wired90W wired, 50W wireless
Rear cameras50MP main, 50MP ultra-wide, 64MP telephoto 3x periscope50MP main, 50MP telephoto 5x periscope, 12MP ultra-wide
Dimensions164.1 × 75.3 × 8.2 mm162.7 × 77.9 × 8.0 mm
Weight202 g210 g
Water resistanceIP68IP68
Supported untilNov 2028Sep 2030
X100 full verdict →15T 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.