13 vs 15

Phone 1

Phone 2

Winner

OnePlus 13

The 13 wins this one, taking battery and software longevity decisively. Against the 15 it's also the sounder buy at $14.21 per month of safe use.

Value Score: 13 74 · 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.

OnePlus 13 $779

Safe to buy$14.21/mo

2025◆ Buy-by Jan 20292031

Xiaomi 15 $750

Safe to buy$16.81/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

13 10015 90

The 13's screen is the better one — 6.82-inch ltpo amoled, qhd+, 1–120hz, up to 4500 nits peak.

Performance

13 9815 98

Performance is a wash — same chip tier.

Camera

13 7915 79

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

Battery

13 10015 85

6,000mAh vs 5,240mAh — the 13 lasts longer between charges.

Software longevity

13 6515 53

The 13 is supported until Jan 2031 — 10 months longer than the 15.

Value

13 7415 67

Overall value goes to the 13 at $14.21 per month of safe use.

Full spec table

Spec	13	15
Price (street)	$779	$750
Display	6.82-inch LTPO AMOLED, QHD+, 1–120Hz, up to 4500 nits peak	6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+
Chipset	Snapdragon 8 Elite	Snapdragon 8 Elite
RAM	12GB/16GB	12GB
Storage	256GB/512GB	256GB/512GB
Battery	6,000 mAh	5,240 mAh
Charging	100W wired SUPERVOOC, 50W AIRVOOC wireless	90W wired, 50W wireless
Rear cameras	50MP main, 50MP ultra-wide, 50MP periscope 3x	50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions	162.9 × 76.5 × 8.5 mm	152.3 × 71.2 × 8.08 mm
Weight	210 g	191 g
Water resistance	IP68/IP69	IP68
Supported until	Jan 2031	Mar 2030

13 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.