13 vs 15

Phone 1

Phone 2

Winner

Xiaomi 15

Lifespan decides this one: the 15 is supported until Mar 2030 at $16.89 per month of safe use, while the 13 runs out in Dec 2027 ($22.44/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 13 40 · 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 13 $400

Avoid buying$22.44/mo

2022◆ Buy-by Dec 20252027

Xiaomi 15 $750

Safe to buy$16.89/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

13 7015 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

13 8515 98

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

Camera

13 7915 79

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

Battery

13 7015 85

5,240mAh vs 4,500mAh — the 15 lasts longer between charges.

Software longevity

13 2115 53

The 15 is supported until Mar 2030 — 27 months longer than the 13.

Value

13 4015 67

Overall value goes to the 15 at $16.89 per month of safe use.

Full spec table

Spec	13	15
Price (street)	$400	$750
Display	6.36-inch AMOLED, 2400 x 1080, 120Hz	6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+
Chipset	Qualcomm Snapdragon 8 Gen 2	Snapdragon 8 Elite
RAM	8GB/12GB	12GB
Storage	128GB/256GB/512GB	256GB/512GB
Battery	4,500 mAh	5,240 mAh
Charging	67W wired, 50W wireless	90W wired, 50W wireless
Rear cameras	50MP main, 12MP ultra-wide, 10MP telephoto 3.2x	50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions	152.8 × 71.5 × 8.0 mm	152.3 × 71.2 × 8.08 mm
Weight	189 g	191 g
Water resistance	IP68	IP68
Supported until	Dec 2027	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.