Qualcomm Snapdragon 660 Advantages
Lower TDP (5W vs 6W)
HiSilicon Kirin 9000 Advantages
Better graphics card performance FLOPS (2.3316 TFLOPS vs 0.2176 TFLOPS )
Larger memory bandwidth (44GB/s vs 13.9GB/s)
Higher Frequency (3130MHz vs 2200MHz)
More modern manufacturing process (5nm vs 14nm)
Released 3 years and 5 months late