Qualcomm Snapdragon 625 Advantages
Lower TDP (5W vs 9W)
Qualcomm Snapdragon 835 Advantages
Better graphics card performance FLOPS (0.5675 TFLOPS vs 0.1248 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 7.46GB/s)
Higher Frequency (2450MHz vs 2000MHz)
More modern manufacturing process (10nm vs 14nm)
Released 9 months late