MediaTek Helio G99 Advantages
More modern manufacturing process (6nm vs 7nm)
Lower TDP (5W vs 6W)
Released 1 years and 4 months late
Qualcomm Snapdragon 870 Advantages
Better graphics card performance FLOPS (1.3721 TFLOPS vs 0.2816 TFLOPS )
Larger memory bandwidth (44GB/s vs 17.1GB/s)
Higher Frequency (3200MHz vs 2200MHz)