MediaTek Helio G91 Advantages
Larger memory bandwidth (13.41GB/s vs 5.3GB/s)
Higher Frequency (2000MHz vs 1800MHz)
More modern manufacturing process (12nm vs 14nm)
Released 6 years and 8 months late
Qualcomm Snapdragon 636 Advantages
Better graphics card performance FLOPS (0.1843 TFLOPS vs 0.096 TFLOPS )