Samsung Galaxy S8: Exynos vs Snapdragon (Memory)

Here's the comparison of internal memory and RAM speed using CPDT:

As you can see, Exynos 8895 based Galaxy S8 is slightly stronger in sequential speeds (10-20%), faster in random reads (35%). Qualcomm Snapdragon 835 is faster is random writes (25 - you can notice the difference in how quickly Google Play Apps are installed)%)  25% better in RAM speed.

Benchmark results at CPDT web page.