realme RMX 3780 256GB vs OPPO Reno 15 512GB: which one suits you?
The two differ in 9 of the specs we have recorded, and the realme RMX 3780 256GB is cheaper by SAR 1,832 (prices checked 10 Nov 2026).
Which one should you choose?
Choose the
realme RMX 3780 256GB if you care about:- Paying less: cheaper by SAR 1,832
- Higher-resolution main camera (100 MP vs 50 MP)
- Higher warranty: 2 years vs 1 years
Choose the
OPPO Reno 15 512GB if you care about:- More space for photos and apps (512 GB vs 256 GB)
- Bigger battery for a longer day (6,500 mAh vs 5,000 mAh)
The deciding difference here: storage and battery capacity and price.
Compares recorded specs; a missing spec does not mean the feature is absent.
Key differences
Storage
256 GB✓ 512 GBScreen size
6.72 in6.59 inDisplay type
LCDAMOLED
Specifications side by side
18 of 18 specs
Scroll the table sideways to see the rest.
| Spec | | |
|---|---|---|
| Reference price | SAR 781 | SAR 2,613 |
| Storage | 256 GB | ✓ 512 GB |
| Processor | — | Snapdragon 7 Gen 4 |
| Battery capacity | 5,000 mAh | ✓ 6,500 mAh |
| Wired charging | — | 80 W |
| Main camera | ✓ 100 MP | 50 MP |
| Memory (RAM) | 8 GB | 8 GB |
| 5G | Yes | Yes |
| Optical zoom (telephoto) | — | 3.5 x |
| Front camera | — | 50 MP |
| Screen size | 6.72 in | 6.59 in |
| Display type | LCD | AMOLED |
| Resolution | 1080 x 2400 | 1256 x 2760 |
| Screen refresh rate | 120 Hz | — |
| Dual SIM | — | Yes |
| Operating system | Android 13.0 | Android 16.0 |
| Release year | 2023 | 2026 |
| Weight | 190 g | — |
| Warranty | ✓ 2 years | 1 years |
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Direct comparison questions
What is the difference in storage between the realme RMX 3780 256GB and the OPPO Reno 15 512GB?
Storage is higher on the OPPO Reno 15 512GB: 512 GB vs 256 GB on the realme RMX 3780 256GB. If this spec is your priority, the difference favours it.
What is the difference in main camera between the realme RMX 3780 256GB and the OPPO Reno 15 512GB?
Main camera is higher on the realme RMX 3780 256GB: 100 MP vs 50 MP on the OPPO Reno 15 512GB. If this spec is your priority, the difference favours it.
What is the difference in battery capacity between the realme RMX 3780 256GB and the OPPO Reno 15 512GB?
Battery capacity is higher on the OPPO Reno 15 512GB: 6,500 mAh vs 5,000 mAh on the realme RMX 3780 256GB. If this spec is your priority, the difference favours it.
What is the difference in memory (RAM) between the realme RMX 3780 256GB and the OPPO Reno 15 512GB?
No difference here: memory (RAM) is 8 GB on both.