MediaTek Helio G99 Advantages
Higher Frequency (2200MHz vs 2150MHz)
More modern manufacturing process (6nm vs 14nm)
Lower TDP (5W vs 11W)
Released 6 years and 6 months late
Qualcomm Snapdragon 820 Advantages
Better graphics card performance FLOPS (0.3194 TFLOPS vs 0.2816 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 17.1GB/s)