OPPO A40m 256GB vs Xiaomi 15 512GB: which one suits you?
The two differ in 14 of the specs we have recorded, and the OPPO A40m 256GB is cheaper by SAR 227 (prices checked 5 Nov 2026).
Which one should you choose?
Choose the
OPPO A40m 256GB if you care about:- Paying less: cheaper by SAR 227
- Larger screen size: 6.7 in vs 6.36 in · slight difference
Choose the
Xiaomi 15 512GB if you care about:- More space for photos and apps (512 GB vs 256 GB)
- More memory for multitasking (12 GB vs 8 GB)
- Higher wired charging: 90 W vs 45 W
The deciding difference here: storage and memory (RAM) and price.
Compares recorded specs; a missing spec does not mean the feature is absent.
Key differences
Storage
256 GB✓ 512 GBMemory (RAM)
8 GB✓ 12 GBScreen size
✓ 6.7 in6.36 in
Specifications side by side
22 of 22 specs
Scroll the table sideways to see the rest.
| Spec | | |
|---|---|---|
| Reference price | SAR 2,229 | SAR 2,456 |
| Storage | 256 GB | ✓ 512 GB |
| Memory (RAM) | 8 GB | ✓ 12 GB |
| Processor | — | Snapdragon 8 Elite |
| Battery capacity | 5,100 mAh | 5,240 mAh |
| Wired charging | 45 W | ✓ 90 W |
| 5G | No | ✓ Yes |
| Main camera | 50 MP | 50 MP |
| Optical zoom (telephoto) | — | 2.6 x |
| Front camera | 5 MP | ✓ 50 MP |
| Screen size | ✓ 6.7 in | 6.36 in |
| Display type | — | AMOLED |
| Resolution | 1604 x 720 | 1200 x 2670 |
| Screen refresh rate | 120 Hz | 120 Hz |
| Wireless charging | No | ✓ Yes |
| Water and dust rating | IP54 | IP68 |
| Operating system | — | Android 15 |
| Dual SIM | Yes | Yes |
| Release year | 2024 | 2025 |
| Colour | Black | — |
| Dimensions | 16.6 x 7.6 x 0.8 cm | 15.2 x 7.1 x 0.8 cm |
| Weight | 200 g | 191 g |
| Warranty | 1 years | ✓ 2 years |
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Before you buy
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Similar comparisons
Direct comparison questions
What is the difference in storage between the OPPO A40m 256GB and the Xiaomi 15 512GB?
Storage is higher on the Xiaomi 15 512GB: 512 GB vs 256 GB on the OPPO A40m 256GB. If this spec is your priority, the difference favours it.
What is the difference in main camera between the OPPO A40m 256GB and the Xiaomi 15 512GB?
No difference here: main camera is 50 MP on both.
What is the difference in battery capacity between the OPPO A40m 256GB and the Xiaomi 15 512GB?
Battery capacity is higher on the Xiaomi 15 512GB: 5,240 mAh vs 5,100 mAh on the OPPO A40m 256GB. If this spec is your priority, the difference favours it.
What is the difference in wired charging between the OPPO A40m 256GB and the Xiaomi 15 512GB?
Wired charging is higher on the Xiaomi 15 512GB: 90 W vs 45 W on the OPPO A40m 256GB. If this spec is your priority, the difference favours it.