Qualcomm Snapdragon 690 Advantages
Better graphics card performance FLOPS (0.4864 TFLOPS vs 0.2432 TFLOPS )
Larger memory bandwidth (14.9GB/s vs 13.9GB/s)
More modern manufacturing process (8nm vs 11nm)
Qualcomm Snapdragon 662 Advantages
Lower TDP (4W vs 6W)