Qualcomm Snapdragon 662 Advantages
More modern manufacturing process (11nm vs 20nm)
Released 5 years and 9 months late
Qualcomm Snapdragon 810 Advantages
Better graphics card performance FLOPS (0.3072 TFLOPS vs 0.2432 TFLOPS )
Larger memory bandwidth (25.6GB/s vs 13.9GB/s)