Qualcomm Snapdragon 835 Advantages
Better graphics card performance FLOPS (0.5675 TFLOPS vs 0.4864 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 14.9GB/s)
Higher Frequency (2450MHz vs 2000MHz)
Qualcomm Snapdragon 690 Advantages
More modern manufacturing process (8nm vs 10nm)
Lower TDP (6W vs 9W)
Released 3 years and 7 months late