MediaTek Dimensity 8020 Advantages
More modern manufacturing process (6nm vs 7nm)
Lower TDP (4W vs 9W)
Released 3 years and 6 months late
Samsung Exynos 990 Advantages
Better graphics card performance FLOPS (1.126 TFLOPS vs 0.9792 TFLOPS )
Larger memory bandwidth (44GB/s vs 34.1GB/s)
Higher Frequency (2730MHz vs 2600MHz)