Xiaomi 15 Ultra vs Xiaomi Redmi K70 Ultra
Compare Xiaomi 15 Ultra vs Xiaomi Redmi K70 Ultra side by side: Qualcomm Snapdragon 8 Elite vs MediaTek Dimensity 9300+ (4 nm), 50MP vs 50MP camera, 6000mAh…
Xiaomi
15 Ultra
$1,499
9categories won
Xiaomi
Redmi K70 Ultra
$499
9categories won
3 categories tied · 21 scored in total · add a third phone
Which one wins?
Xiaomi 15 Ultra takes the overall win
The Xiaomi 15 Ultra claims the overall win over the Xiaomi Redmi K70 Ultra, delivering a stronger technical package across battery endurance and core hardware. For battery longevity and charging speed, the 15 Ultra takes the lead, while the Redmi K70 Ultra is the clear choice for demanding 3D gaming and heavy multitasking. Choose the 15 Ultra if you want the highest performance ceiling, or opt for the Redmi K70 Ultra if its lower retail price better fit your budget.
15 Ultra wins on endurance with 6,000 mAh and 90W fast charging.
Redmi K70 Ultra provides greater sustained gaming output with its MediaTek Dimensity 9300+ (4 nm) and 24GB RAM.
15 Ultra wins photography with 50MP main imaging and 4.3x dedicated optical zoom.
Redmi K70 Ultra wins on budget and value at $499 compared to $1499.
Category verdicts are computed algorithmically from verified technical specifications and hardware benchmarks. Rows where neither figure is objectively better — screen size preference, operating system choice, aesthetic build materials — are displayed for direct reference without scoring bias.
15 Ultra vs Redmi K70 Ultra: specifications compared
Display
| Specification | 15 Ultra | Redmi K70 Ultra |
|---|---|---|
| Screen size | 6.73" | 6.67" |
| Resolution | 1440 x 3200Winner | 1220 x 2712 |
| Pixel density | 522 ppiWinner | 446 ppi |
| Refresh rate | 120 Hz | 144 HzWinner |
| Peak brightness | 3200 nits | 4000 nitsWinner |
Performance
| Specification | 15 Ultra | Redmi K70 Ultra |
|---|---|---|
| Chipset | Qualcomm Snapdragon 8 Elite | MediaTek Dimensity 9300+ (4 nm) |
| Process node | 3 nmWinner | 4 nm |
| AnTuTu score | 2,840,000 | 3,200,000Winner |
| Geekbench multi | 9940 | 10800Winner |
| Maximum RAM | 16 GB | 24 GBWinner |
| Maximum storage | 1TB | 1TB |
Camera
| Specification | 15 Ultra | Redmi K70 Ultra |
|---|---|---|
| Main sensor | 50 MP | 50 MP |
| Rear cameras | 4Winner | 3 |
| Optical zoom | 4.3x | — |
| Ultrawide | 50 MPWinner | 8 MP |
| Selfie camera | 32 MPWinner | 20 MP |
| Max video | 8K at 30fps, 4K at 120fps Dolby Vision | 8K at 24fps |
Battery and charging
| Specification | 15 Ultra | Redmi K70 Ultra |
|---|---|---|
| Capacity | 6,000 mAhWinner | 5,500 mAh |
| Wired charging | 90 W | 120 WWinner |
| Wireless charging | 80 WWinner | 25 W |
Design
| Specification | 15 Ultra | Redmi K70 Ultra |
|---|---|---|
| Weight | 226 g | 211 gWinner |
| Thickness | 9.4 mm | 8.39 mmWinner |
| Water resistance | IP68 | IP68 |
| Build | Aerospace aluminum frame, eco-leather or ceramic-glass back | High-strength aluminum alloy frame, Xiaomi Longjing Glass front, glass back |
Software and support
| Specification | 15 Ultra | Redmi K70 Ultra |
|---|---|---|
| Operating system | Android 15 | Android 14 (HyperOS) |
| OS updates | 4 years | 4 years |
| Security updates | 6 yearsWinner | 4 years |
Connectivity and value
| Specification | 15 Ultra | Redmi K70 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 7 (802.11be) | Wi-Fi 7 (802.11be, tri-band 2.4/5/6GHz, 320MHz bandwidth) |
| Storage expansion | None | None |
| 3.5mm jack | No | No |
| Launch price | $1,499 | $499Winner |
Xiaomi 15 Ultra
Equipped with a giant 1-inch Sony LYT-900 primary sensor, an audacious 200MP 4.3x periscope telephoto, a massive 6000 mAh silicon-carbon battery, and 90W fast charging, the Xiaomi 15 Ultra is the ultimate optical zoom powerhouse.
- Display
- 6.73"
- Chipset
- Qualcomm Snapdragon 8 Elite
- Main camera
- 50MP
- Battery
- 6,000mAh
Xiaomi Redmi K70 Ultra
The Xiaomi Redmi K70 Ultra captured global acclaim by equipping MediaTek’s All-Big-Core Dimensity 9300+ processor with an independent D1 graphics chip, 144Hz 4000-nit screen, IP68 water resistance, and 120W HyperCharge under $500.
- Display
- 6.67"
- Chipset
- MediaTek Dimensity 9300+ (4 nm)
- Main camera
- 50MP
- Battery
- 5,500mAh