Aquos R9 vs Redmi K70 Ultra

Phone 1

Phone 2

Winner

Xiaomi Redmi K70 Ultra

The Redmi K70 Ultra wins this one, taking display and performance decisively. Against the Aquos R9 it's also the sounder buy at $15.17 per month of safe use.

Value Score: Aquos R9 57 · Redmi K70 Ultra 73 — methodology

The lifespan decider

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

Sharp Aquos R9 $530

Buy with care$20.01/mo

2024◆ Buy-by Sep 20262028

Xiaomi Redmi K70 Ultra $380

Buy with care$15.17/mo

2024◆ Buy-by Jul 20262028

Category by category

Display

Aquos R9 60Redmi K70 Ultra 80

The Redmi K70 Ultra's screen is the better one — 6.67-inch amoled, 1.5k, 144hz, 4000 nits peak, dolby vision.

Performance

Aquos R9 78Redmi K70 Ultra 95

The Redmi K70 Ultra's MediaTek Dimensity 9300+ (4nm) is simply the faster chip.

Camera

Aquos R9 67Redmi K70 Ultra 67

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

Battery

Aquos R9 80Redmi K70 Ultra 90

5,500mAh vs 5,000mAh — the Redmi K70 Ultra lasts longer between charges.

Software longevity

Aquos R9 32Redmi K70 Ultra 30

Both phones' support windows end around the same time.

Value

Aquos R9 57Redmi K70 Ultra 73

Overall value goes to the Redmi K70 Ultra at $15.17 per month of safe use.

Full spec table

Spec	Aquos R9	Redmi K70 Ultra
Price (street)	$530	$380
Display	6.5-inch Pro IGZO LTPO OLED, FHD+, up to 240Hz, ~2000 nits peak	6.67-inch AMOLED, 1.5K, 144Hz, 4000 nits peak, Dolby Vision
Chipset	Qualcomm Snapdragon 7+ Gen 3 (4nm)	MediaTek Dimensity 9300+ (4nm)
RAM	12GB	12GB/16GB/24GB
Storage	256GB	256GB/512GB/1TB
Battery	5,000 mAh	5,500 mAh
Charging	USB-C wired (no wireless)	120W wired
Rear cameras	50MP main, 50MP ultra-wide	50MP main, 8MP ultra-wide, 2MP macro
Dimensions	156 × 75 × 8.9 mm	160.4 × 75.1 × 8.4 mm
Weight	195 g	211 g
Water resistance	IP68 (also MIL-STD-810G)	IP68
Supported until	Sep 2028	Jul 2028

Aquos R9 full verdict →Redmi K70 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.