GT 6T vs 15T

Phone 1

Phone 2

Winner

Xiaomi 15T

Lifespan decides this one: the 15T is supported until Sep 2030 at $9.76 per month of safe use, while the GT 6T runs out in May 2028 ($14.56/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: GT 6T 72 · 15T 70 — methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Realme GT 6T $340

Buy with care$14.56/mo

2024◆ Buy-by May 20262028

Xiaomi 15T $500

Safe to buy$9.76/mo

2025◆ Buy-by Sep 20282030

Category by category

Display

GT 6T 9015T 70

The GT 6T's screen is the better one — 6.78-inch ltpo amoled, 1.5k, 120hz, up to 6000 nits peak, gorilla glass victus 2.

Performance

GT 6T 7815T 78

Performance is a wash — same chip tier.

Camera

GT 6T 6715T 79

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

Battery

GT 6T 9015T 90

Battery capacities are close enough not to decide this.

Software longevity

GT 6T 2815T 61

The 15T is supported until Sep 2030 — 28 months longer than the GT 6T.

Value

GT 6T 7215T 70

Pound for pound, these two are equally good deals.

Full spec table

Spec	GT 6T	15T
Price (street)	$340	$500
Display	6.78-inch LTPO AMOLED, 1.5K, 120Hz, up to 6000 nits peak, Gorilla Glass Victus 2	6.83-inch AMOLED, 2772x1280, 144Hz
Chipset	Qualcomm Snapdragon 7+ Gen 3 (4nm)	MediaTek Dimensity 8400-Ultra
RAM	8GB/12GB	12GB
Storage	128GB/256GB/512GB	256GB/512GB
Battery	5,500 mAh	5,500 mAh
Charging	120W wired (50% in 10 min)	67W wired
Rear cameras	50MP main, 8MP ultra-wide	50MP main, 50MP telephoto 2x, 12MP ultra-wide
Dimensions	162 × 75.1 × 8.7 mm	163.2 × 78.0 × 7.5 mm
Weight	191 g	194 g
Water resistance	IP65	IP68
Supported until	May 2028	Sep 2030

GT 6T full verdict →15T 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.