Samsung Exynos 9609 Advantages
Higher Frequency (2200MHz vs 2100MHz)
More modern manufacturing process (10nm vs 20nm)
Released 4 years late
MediaTek Helio X20 Advantages
Better graphics card performance FLOPS (0.0998 TFLOPS vs 0.0918 TFLOPS )
Larger memory bandwidth (12.8GB/s vs 11.9GB/s)
Lower TDP (5W vs 9W)