MediaTek Dimensity 810 Advantages
Higher Frequency (2400MHz vs 2342MHz)
More modern manufacturing process (6nm vs 14nm)
Lower TDP (6W vs 11W)
Released 5 years late
Qualcomm Snapdragon 821 Advantages
Better graphics card performance FLOPS (0.3343 TFLOPS vs 0.243 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 17.07GB/s)