PhoneLifespan

6 vs 15

vs

It depends

Too close to call outright

These two are within 1 point overall, so it depends on you: keep phones for years → 6 (supported until Jun 2033); want maximum speed → 15 (Snapdragon 8 Elite).

Value Score: 6 66 · 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.

Fairphone 6 $899
Safe to buy$10.67/mo
2025◆ Buy-by Jun 20312033
Xiaomi 15 $750
Safe to buy$16.87/mo
2025◆ Buy-by Mar 20282030

Category by category

Display
6 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
6 6415 98

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

Camera
6 6715 79

The 15 has the stronger camera system (3 real rear lenses vs 2).

Battery
6 6815 85

5,240mAh vs 4,415mAh — the 15 lasts longer between charges.

Software longevity
6 10015 53

The 6 is supported until Jun 2033 — 40 months longer than the 15.

Value
6 6615 67

Pound for pound, these two are equally good deals.

Full spec table
Spec615
Price (street)$899$750
Display6.31-inch LTPO OLED, FHD+, 10-120Hz adaptive6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+
ChipsetQualcomm Snapdragon 7s Gen 3 (4nm)Snapdragon 8 Elite
RAM8GB12GB
Storage256GB256GB/512GB
Battery4,415 mAh5,240 mAh
Charging30W wired; user-removable battery90W wired, 50W wireless
Rear cameras50MP main, 13MP ultra-wide50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions156.5 × 73.3 × 9.6 mm152.3 × 71.2 × 8.08 mm
Weight193 g191 g
Water resistanceIP55 (also MIL-STD-810H, 1.5m drop)IP68
Supported untilJun 2033Mar 2030

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