PhoneLifespan

Galaxy S25 vs 15

vs

Winner

Samsung Galaxy S25

The Galaxy S25 wins this one, taking software longevity decisively. Against the 15 it's also the sounder buy at $8.83 per month of safe use.

Value Score: Galaxy S25 75 · 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.

Samsung Galaxy S25 $599
Safe to buy$8.83/mo
2025◆ Buy-by Feb 20302032
Xiaomi 15 $750
Safe to buy$16.81/mo
2025◆ Buy-by Mar 20282030

Category by category

Display
Galaxy S25 9015 90

Both displays are effectively the same class.

Performance
Galaxy S25 9815 98

Performance is a wash — same chip tier.

Camera
Galaxy S25 7915 79

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

Battery
Galaxy S25 6015 85

5,240mAh vs 4,000mAh — the 15 lasts longer between charges.

Software longevity
Galaxy S25 8115 53

The Galaxy S25 is supported until Feb 2032 — 23 months longer than the 15.

Value
Galaxy S25 7515 67

Overall value goes to the Galaxy S25 at $8.83 per month of safe use.

Full spec table
SpecGalaxy S2515
Price (street)$599$750
Display6.2-inch Dynamic LTPO AMOLED 2X, FHD+, 1–120Hz, up to 2600 nits6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+
ChipsetSnapdragon 8 Elite for GalaxySnapdragon 8 Elite
RAM12GB12GB
Storage128GB/256GB/512GB256GB/512GB
Battery4,000 mAh5,240 mAh
Charging25W wired, 15W wireless (Qi2 Ready), 4.5W reverse wireless90W wired, 50W wireless
Rear cameras50MP main, 12MP ultra-wide, 10MP telephoto 3x50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions146.9 × 70.5 × 7.2 mm152.3 × 71.2 × 8.08 mm
Weight162 g191 g
Water resistanceIP68IP68
Supported untilFeb 2032Mar 2030
Galaxy S25 full verdict →15 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.