PhoneLifespan

14T vs 15

vs

It depends

Too close to call outright

These two are within 4 points overall — it genuinely depends on price on the day. The 15 edges both longevity and performance, so prefer it when prices are close.

Value Score: 14T 71 · 15 67 methodology

The lifespan decider

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

Xiaomi 14T $380
Safe to buy$9.63/mo
2024◆ Buy-by Sep 20272029
Xiaomi 15 $750
Safe to buy$16.81/mo
2025◆ Buy-by Mar 20282030

Category by category

Display
14T 8015 90

The 15's screen is the better one — 6.36-inch crystalres amoled, 2670×1200 (460 ppi), 1–120hz ltpo, up to 3200 nits peak, dolby vision/hdr10+.

Performance
14T 7315 98

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

Camera
14T 7915 79

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

Battery
14T 8015 85

5,240mAh vs 5,000mAh — the 15 lasts longer between charges.

Software longevity
14T 4715 53

The 15 is supported until Mar 2030 — 5 months longer than the 14T.

Value
14T 7115 67

Overall value goes to the 14T at $9.63 per month of safe use.

Full spec table
Spec14T15
Price (street)$380$750
Display6.67-inch AMOLED, 2712×1220 (446 ppi), up to 144Hz, up to 4000 nits peak6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+
ChipsetMediaTek Dimensity 8300-UltraSnapdragon 8 Elite
RAM12GB12GB
Storage256GB/512GB256GB/512GB
Battery5,000 mAh5,240 mAh
Charging67W wired90W wired, 50W wireless
Rear cameras50MP main (Leica, Sony IMX906, OIS), 50MP telephoto 2x (50mm), 12MP ultra-wide (120° FOV)50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions160.5 × 75.1 × 7.80 mm152.3 × 71.2 × 8.08 mm
Weight195 g191 g
Water resistanceIP68IP68
Supported untilSep 2029Mar 2030

Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.