MediaTek Helio G91 Advantages
Released 6 years and 9 months late
HiSilicon Kirin 970 Advantages
Better graphics card performance FLOPS (0.3318 TFLOPS vs 0.096 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 13.41GB/s)
Higher Frequency (2360MHz vs 2000MHz)
More modern manufacturing process (10nm vs 12nm)