HiSilicon Kirin 820 Advantages
Better graphics card performance FLOPS (0.6528 TFLOPS vs 0.487 TFLOPS )
Larger memory bandwidth (31.78GB/s vs 17GB/s)
Lower TDP (5W vs 6W)
Samsung Exynos 1280 Advantages
Higher Frequency (2400MHz vs 2360MHz)
More modern manufacturing process (5nm vs 7nm)
Released 2 years late