Qualcomm Snapdragon 855 Advantages
Better graphics card performance FLOPS (0.8985 TFLOPS vs 0.0576 TFLOPS )
Larger memory bandwidth (34.13GB/s vs 12.8GB/s)
Higher Frequency (2840MHz vs 2300MHz)
More modern manufacturing process (7nm vs 16nm)
Released 2 years and 10 months late
MediaTek Helio P20 Advantages
Lower TDP (5W vs 6W)