13s vs 15

Phone 1

Phone 2

Winner

OnePlus 13s

The 13s wins this one, taking software longevity and battery decisively. Against the 15 it's also the sounder buy at $10.01 per month of safe use.

Value Score: 13s 76 · 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 13s $600

Safe to buy$10.01/mo

2025◆ Buy-by Jun 20292031

Xiaomi 15 $750

Safe to buy$16.81/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

13s 9015 90

Both displays are effectively the same class.

Performance

13s 9815 98

Performance is a wash — same chip tier.

Camera

13s 6715 79

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

Battery

13s 9715 85

5,850mAh vs 5,240mAh — the 13s lasts longer between charges.

Software longevity

13s 7115 53

The 13s is supported until Jun 2031 — 15 months longer than the 15.

Value

13s 7615 67

Overall value goes to the 13s at $10.01 per month of safe use.

Full spec table

Spec	13s	15
Price (street)	$600	$750
Display	6.32-inch 1.5K (1216×2640) LTPO AMOLED, 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	Qualcomm Snapdragon 8 Elite (3nm)	Snapdragon 8 Elite
RAM	12GB	12GB
Storage	256GB/512GB	256GB/512GB
Battery	5,850 mAh	5,240 mAh
Charging	80W SuperVOOC wired	90W wired, 50W wireless
Rear cameras	50MP main, 50MP telephoto 2x	50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions	150.8 × 71.7 × 8.2 mm	152.3 × 71.2 × 8.08 mm
Weight	185 g	191 g
Water resistance	IP65	IP68
Supported until	Jun 2031	Mar 2030

13s 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.