Xiaomi 15 Ultra vs Xiaomi Redmi A3x
Compare Xiaomi 15 Ultra vs Xiaomi Redmi A3x side by side: Qualcomm Snapdragon 8 Elite vs Unisoc T603, 50MP vs 8MP camera, 6000mAh vs 5000mAh battery, $1499 vs…
Xiaomi
15 Ultra
$1,499
17categories won
Xiaomi
Redmi A3x
$79
3categories won
20 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 A3x, delivering a stronger technical package across gaming and photography. In camera testing, the 15 Ultra leads with sharper imaging, while battery endurance leans towards the 15 Ultra. Choose the 15 Ultra if you want the highest performance ceiling, or opt for the Redmi A3x if its lower retail price better fit your budget.
15 Ultra wins on endurance with 6,000 mAh and 90W fast charging.
15 Ultra leads gaming and raw performance powered by the Qualcomm Snapdragon 8 Elite and 16GB RAM.
15 Ultra wins photography with 50MP main imaging and 4.3x dedicated optical zoom.
Redmi A3x wins on budget and value at $79 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 A3x: specifications compared
Display
| Specification | 15 Ultra | Redmi A3x |
|---|---|---|
| Screen size | 6.73" | 6.71" |
| Resolution | 1440 x 3200Winner | 720 x 1650 |
| Pixel density | 522 ppiWinner | 268 ppi |
| Refresh rate | 120 HzWinner | 90 Hz |
| Peak brightness | 3200 nitsWinner | 500 nits |
Performance
| Specification | 15 Ultra | Redmi A3x |
|---|---|---|
| Chipset | Qualcomm Snapdragon 8 Elite | Unisoc T603 |
| Process node | 3 nmWinner | 12 nm |
| AnTuTu score | 2,840,000Winner | 180,000 |
| Geekbench multi | 9940Winner | 1120 |
| Maximum RAM | 16 GBWinner | 4 GB |
| Maximum storage | 1TBWinner | 128GB |
Camera
| Specification | 15 Ultra | Redmi A3x |
|---|---|---|
| Main sensor | 50 MPWinner | 8 MP |
| Rear cameras | 4Winner | 2 |
| Optical zoom | 4.3x | — |
| Ultrawide | 50 MP | — |
| Selfie camera | 32 MPWinner | 5 MP |
| Max video | 8K at 30fps, 4K at 120fps Dolby Vision | 1080p@30fps |
Battery and charging
| Specification | 15 Ultra | Redmi A3x |
|---|---|---|
| Capacity | 6,000 mAhWinner | 5,000 mAh |
| Wired charging | 90 WWinner | 10 W |
| Wireless charging | 80 WWinner | No |
Design
| Specification | 15 Ultra | Redmi A3x |
|---|---|---|
| Weight | 226 g | 193 gWinner |
| Thickness | 9.4 mm | 8.3 mmWinner |
| Water resistance | IP68 | IP52 |
| Build | Aerospace aluminum frame, eco-leather or ceramic-glass back | Premium circular halo glass back design, polycarbonate frame |
Software and support
| Specification | 15 Ultra | Redmi A3x |
|---|---|---|
| Operating system | Android 15 | Android 14 |
| OS updates | 4 yearsWinner | 2 years |
| Security updates | 6 yearsWinner | 3 years |
Connectivity and value
| Specification | 15 Ultra | Redmi A3x |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 7 (802.11be) | Wi-Fi 4 (802.11n) |
| Storage expansion | None | microSD |
| 3.5mm jack | No | No |
| Launch price | $1,499 | $79Winner |
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 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