realme RMX 3780 256GB vs Tecno Spark 40 (5G) 256GB 8GB Ram Ink Black: which one suits you?

The two differ in 7 of the specs we have recorded, and the Tecno Spark 40 (5G) 256GB 8GB Ram Ink Black is cheaper by SAR 82 (prices checked 12 Nov 2026).

Which one should you choose?

  • Higher-resolution main camera (100 MP vs 50 MP)
  • Paying less: cheaper by SAR 82
  • Bigger battery for a longer day (6,000 mAh vs 5,000 mAh)

The deciding difference here: battery capacity and main camera and price.

Compares recorded specs; a missing spec does not mean the feature is absent.

Key differences

  • Screen size

    6.72 in6.75 in
  • Display type

    LCDAMOLED
  • Resolution

    1080 x 2400720 x 1600

Specifications side by side

16 of 16 specs

Scroll the table sideways to see the rest.

Spec
realmeSAR 781
realme RMX 3780 256GB specs
SAR 699
Tecno Spark 40 (5G) 256GB 8GB Ram Ink Black specs
Reference priceSAR 781SAR 699
Processor—Dimensity 6400
Battery capacity5,000 mAh✓ 6,000 mAh
Wired charging—18 W
Main camera✓ 100 MP50 MP
Storage256 GB256 GB
Memory (RAM)8 GB8 GB
5GYesYes

Facts come from each Amazon.sa listing. As an Amazon Associate we earn from qualifying purchases. Buying through our links costs you nothing extra.

Before you buy

Prices, availability, shipping and returns can change. Check the final details on Amazon.sa before you buy.

Similar comparisons

Direct comparison questions

What is the difference in storage between the realme RMX 3780 256GB and the Tecno Spark 40 (5G) 256GB 8GB Ram Ink Black?

No difference here: storage is 256 GB on both.

What is the difference in main camera between the realme RMX 3780 256GB and the Tecno Spark 40 (5G) 256GB 8GB Ram Ink Black?

Main camera is higher on the realme RMX 3780 256GB: 100 MP vs 50 MP on the Tecno Spark 40 (5G) 256GB 8GB Ram Ink Black. 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 Tecno Spark 40 (5G) 256GB 8GB Ram Ink Black?

Battery capacity is higher on the Tecno Spark 40 (5G) 256GB 8GB Ram Ink Black: 6,000 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 Tecno Spark 40 (5G) 256GB 8GB Ram Ink Black?

No difference here: memory (RAM) is 8 GB on both.