Qualcomm Snapdragon 626 Advantages
Larger memory bandwidth (7.5GB/s vs 5.3GB/s)
Higher Frequency (2200MHz vs 1800MHz)
Qualcomm Snapdragon 636 Advantages
Better graphics card performance FLOPS (0.1843 TFLOPS vs 0.1248 TFLOPS )
Lower TDP (5W vs 11W)
Released 1 years late