HiSilicon Kirin 810 Advantages
More modern manufacturing process (7nm vs 8nm)
Lower TDP (5W vs 9W)
Released 7 months late
Samsung Exynos 9820 Advantages
Better graphics card performance FLOPS (0.607 TFLOPS vs 0.2362 TFLOPS )
Larger memory bandwidth (33.4GB/s vs 31.78GB/s)
Higher Frequency (2730MHz vs 2270MHz)