Samsung Exynos 9609 Advantages
More modern manufacturing process (10nm vs 14nm)
Released 2 years late
Qualcomm Snapdragon 660 Advantages
Better graphics card performance FLOPS (0.2176 TFLOPS vs 0.0918 TFLOPS )
Larger memory bandwidth (13.9GB/s vs 11.9GB/s)
Lower TDP (5W vs 9W)