Xiaomi Redmi A3x vs Xiaomi Redmi K70 Ultra
Compare Xiaomi Redmi A3x vs Xiaomi Redmi K70 Ultra side by side: Unisoc T603 vs MediaTek Dimensity 9300+ (4 nm), 8MP vs 50MP camera, 5000mAh vs 5500mAh…
Xiaomi
Redmi A3x
$79
2categories won
Xiaomi
Redmi K70 Ultra
$499
17categories won
1 categories tied · 20 scored in total · add a third phone
Which one wins?
Xiaomi Redmi K70 Ultra takes the overall win
The Xiaomi Redmi K70 Ultra proves superior overall against the Xiaomi Redmi A3x, outperforming on gaming and photography. In camera testing, the Redmi K70 Ultra leads with superior optics, while battery endurance leans towards the Redmi K70 Ultra. Choose the Redmi K70 Ultra if you want the highest performance ceiling, or opt for the Redmi A3x if its lower retail price better fit your budget.
Redmi K70 Ultra takes battery honors offering 5,500 mAh alongside 120W charging.
Redmi K70 Ultra provides greater sustained gaming output with its MediaTek Dimensity 9300+ (4 nm) and 24GB RAM.
Redmi K70 Ultra takes photography with 50MP optics.
Redmi A3x provides a sharper value proposition, coming in at $79 vs $499.
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.
Redmi A3x vs Redmi K70 Ultra: specifications compared
Display
| Specification | Redmi A3x | Redmi K70 Ultra |
|---|---|---|
| Screen size | 6.71" | 6.67" |
| Resolution | 720 x 1650 | 1220 x 2712Winner |
| Pixel density | 268 ppi | 446 ppiWinner |
| Refresh rate | 90 Hz | 144 HzWinner |
| Peak brightness | 500 nits | 4000 nitsWinner |
Performance
| Specification | Redmi A3x | Redmi K70 Ultra |
|---|---|---|
| Chipset | Unisoc T603 | MediaTek Dimensity 9300+ (4 nm) |
| Process node | 12 nm | 4 nmWinner |
| AnTuTu score | 180,000 | 3,200,000Winner |
| Geekbench multi | 1120 | 10800Winner |
| Maximum RAM | 4 GB | 24 GBWinner |
| Maximum storage | 128GB | 1TBWinner |
Camera
| Specification | Redmi A3x | Redmi K70 Ultra |
|---|---|---|
| Main sensor | 8 MP | 50 MPWinner |
| Rear cameras | 2 | 3Winner |
| Ultrawide | — | 8 MP |
| Selfie camera | 5 MP | 20 MPWinner |
| Max video | 1080p@30fps | 8K at 24fps |
Battery and charging
| Specification | Redmi A3x | Redmi K70 Ultra |
|---|---|---|
| Capacity | 5,000 mAh | 5,500 mAhWinner |
| Wired charging | 10 W | 120 WWinner |
| Wireless charging | No | 25 WWinner |
Design
| Specification | Redmi A3x | Redmi K70 Ultra |
|---|---|---|
| Weight | 193 gWinner | 211 g |
| Thickness | 8.3 mm | 8.39 mm |
| Water resistance | IP52 | IP68 |
| Build | Premium circular halo glass back design, polycarbonate frame | High-strength aluminum alloy frame, Xiaomi Longjing Glass front, glass back |
Software and support
| Specification | Redmi A3x | Redmi K70 Ultra |
|---|---|---|
| Operating system | Android 14 | Android 14 (HyperOS) |
| OS updates | 2 years | 4 yearsWinner |
| Security updates | 3 years | 4 yearsWinner |
Connectivity and value
| Specification | Redmi A3x | Redmi K70 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 4 (802.11n) | Wi-Fi 7 (802.11be, tri-band 2.4/5/6GHz, 320MHz bandwidth) |
| Storage expansion | microSD | None |
| 3.5mm jack | No | No |
| Launch price | $79Winner | $499 |
Xiaomi Redmi A3x
The Redmi A3x elevates entry-level smartphones with a genuine Corning Gorilla Glass 3 rear panel, a circular halo camera ring echoing ultra-flagships, 90Hz smooth display, side-mounted fingerprint scanner, and USB-C.
- Display
- 6.71"
- Chipset
- Unisoc T603
- Main camera
- 8MP
- Battery
- 5,000mAh
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