HiSilicon Kirin 658 Advantages
Higher Frequency (2350MHz vs 2150MHz)
Lower TDP (5W vs 11W)
Released 1 years and 4 months late
Qualcomm Snapdragon 820 Advantages
Better graphics card performance FLOPS (0.3194 TFLOPS vs 0.0576 TFLOPS )
More modern manufacturing process (14nm vs 16nm)