Galaxy S23 Ultra vs 15T

Phone 1

Phone 2

Winner

Xiaomi 15T

Lifespan decides this one: the 15T is supported until Sep 2030 at $9.73 per month of safe use, while the Galaxy S23 Ultra runs out in Feb 2028 ($16.82/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Galaxy S23 Ultra 76 · 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.

Samsung Galaxy S23 Ultra $339

Buy with care$16.82/mo

2023◆ Buy-by Feb 20262028

Xiaomi 15T $500

Safe to buy$9.73/mo

2025◆ Buy-by Sep 20282030

Category by category

Display

Galaxy S23 Ultra 9015T 70

The Galaxy S23 Ultra's screen is the better one — 6.8-inch dynamic amoled 2x, qhd+, ltpo 1–120hz, 1750 nits peak.

Performance

Galaxy S23 Ultra 8515T 78

The Galaxy S23 Ultra's Snapdragon 8 Gen 2 for Galaxy is simply the faster chip.

Camera

Galaxy S23 Ultra 9615T 79

The Galaxy S23 Ultra has the stronger camera system (4 real rear lenses vs 3).

Battery

Galaxy S23 Ultra 8015T 90

5,500mAh vs 5,000mAh — the 15T lasts longer between charges.

Software longevity

Galaxy S23 Ultra 2415T 61

The 15T is supported until Sep 2030 — 31 months longer than the Galaxy S23 Ultra.

Value

Galaxy S23 Ultra 7615T 70

Overall value goes to the Galaxy S23 Ultra at $16.82 per month of safe use.

Full spec table

Spec	Galaxy S23 Ultra	15T
Price (street)	$339	$500
Display	6.8-inch Dynamic AMOLED 2X, QHD+, LTPO 1–120Hz, 1750 nits peak	6.83-inch AMOLED, 2772x1280, 144Hz
Chipset	Snapdragon 8 Gen 2 for Galaxy	MediaTek Dimensity 8400-Ultra
RAM	8GB/12GB	12GB
Storage	256GB/512GB/1TB	256GB/512GB
Battery	5,000 mAh	5,500 mAh
Charging	45W wired, 15W wireless, 4.5W reverse wireless	67W wired
Rear cameras	200MP main, 12MP ultra-wide, 10MP telephoto 3x, 10MP periscope 10x	50MP main, 50MP telephoto 2x, 12MP ultra-wide
Dimensions	163.4 × 78.1 × 8.9 mm	163.2 × 78.0 × 7.5 mm
Weight	234 g	194 g
Water resistance	IP68	IP68
Supported until	Feb 2028	Sep 2030

Galaxy S23 Ultra 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.