Qualcomm Snapdragon 630 Advantages
Higher Frequency (2200MHz vs 2000MHz)
Lower TDP (5W vs 6W)
Qualcomm Snapdragon 690 Advantages
Better graphics card performance FLOPS (0.4864 TFLOPS vs 0.1664 TFLOPS )
Larger memory bandwidth (14.9GB/s vs 5.3GB/s)
More modern manufacturing process (8nm vs 14nm)
Released 3 years and 1 months late