MediaTek Helio G85 Advantages
Lower TDP (5W vs 6W)
Released 6 months late
HiSilicon Kirin 990 5G Advantages
Better graphics card performance FLOPS (0.6912 TFLOPS vs 0.096 TFLOPS )
Larger memory bandwidth (34.1GB/s vs 13.41GB/s)
Higher Frequency (2860MHz vs 2000MHz)
More modern manufacturing process (7nm vs 12nm)