Qualcomm Snapdragon 636 Advantages
More modern manufacturing process (14nm vs 20nm)
Released 3 years and 6 months late
Qualcomm Snapdragon 810 Advantages
Better graphics card performance FLOPS (0.3072 TFLOPS vs 0.1843 TFLOPS )
Larger memory bandwidth (25.6GB/s vs 5.3GB/s)
Higher Frequency (2000MHz vs 1800MHz)