Galaxy Z Flip6 vs 15 Ultra

Phone 1

Phone 2

Winner

Samsung Galaxy Z Flip6

Lifespan decides this one: the Galaxy Z Flip6 is supported until Jul 2031 at $11.78 per month of safe use, while the 15 Ultra runs out in Mar 2030 ($30.40/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Galaxy Z Flip6 66 · 15 Ultra 65 — 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 Z Flip6 $720

Safe to buy$11.78/mo

2024◆ Buy-by Jul 20292031

Xiaomi 15 Ultra $1350

Safe to buy$30.40/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

Galaxy Z Flip6 9015 Ultra 100

The 15 Ultra's screen is the better one — 6.73-inch 2k (1440×3200) ltpo amoled, 1–120hz, up to 3200 nits peak.

Performance

Galaxy Z Flip6 9215 Ultra 98

The 15 Ultra's Qualcomm Snapdragon 8 Elite (3nm) is simply the faster chip.

Camera

Galaxy Z Flip6 6715 Ultra 96

The 15 Ultra has the stronger camera system (4 real rear lenses vs 2).

Battery

Galaxy Z Flip6 6015 Ultra 88

5,410mAh vs 4,000mAh — the 15 Ultra lasts longer between charges.

Software longevity

Galaxy Z Flip6 7315 Ultra 53

The Galaxy Z Flip6 is supported until Jul 2031 — 17 months longer than the 15 Ultra.

Value

Galaxy Z Flip6 6615 Ultra 65

Pound for pound, these two are equally good deals.

Full spec table

Spec	Galaxy Z Flip6	15 Ultra
Price (street)	$720	$1350
Display	6.7-inch Dynamic AMOLED 2X inner foldable, FHD+, 1–120Hz, 2600 nits + 3.4-inch Super AMOLED cover	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
Chipset	Snapdragon 8 Gen 3 for Galaxy	Qualcomm Snapdragon 8 Elite (3nm)
RAM	12GB	16GB
Storage	256GB/512GB	512GB/1TB
Battery	4,000 mAh	5,410 mAh
Charging	25W wired, 15W wireless	90W wired, 80W wireless
Rear cameras	50MP main, 12MP ultra-wide	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions	Unfolded 165.1 × 71.9 × 6.9 mm; Folded 85.1 × 71.9 × 14.9 mm	161.3 × 75.3 × 9.35 mm
Weight	187 g	226 g
Water resistance	IP48	IP68
Supported until	Jul 2031	Mar 2030

Galaxy Z Flip6 full verdict →15 Ultra 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.