HiSilicon Kirin 820 Advantages
Lower TDP (5W vs 6W)
HiSilicon Kirin 9000E Advantages
Better graphics card performance FLOPS (2.1373 TFLOPS vs 0.6528 TFLOPS )
Larger memory bandwidth (44GB/s vs 31.78GB/s)
Higher Frequency (3130MHz vs 2360MHz)
More modern manufacturing process (5nm vs 7nm)
Released 7 months late