MediaTek Dimensity 1080 Advantages
More modern manufacturing process (6nm vs 7nm)
Lower TDP (4W vs 6W)
Released 3 years late
HiSilicon Kirin 990 5G Advantages
Better graphics card performance FLOPS (0.6912 TFLOPS vs 0.686 TFLOPS )
Higher Frequency (2860MHz vs 2600MHz)