Qualcomm Snapdragon 810 Advantages
Larger memory bandwidth (25.6GB/s vs 14.9GB/s)
Qualcomm Snapdragon 720G Advantages
Better graphics card performance FLOPS (0.384 TFLOPS vs 0.3072 TFLOPS )
Higher Frequency (2300MHz vs 2000MHz)
More modern manufacturing process (8nm vs 20nm)
Released 5 years and 9 months late