Qualcomm Snapdragon 662 Advantages
More modern manufacturing process (11nm vs 14nm)
Lower TDP (4W vs 5W)
Released 4 years and 2 months late
Samsung Exynos 8890 Advantages
Better graphics card performance FLOPS (0.2496 TFLOPS vs 0.2432 TFLOPS )
Larger memory bandwidth (26.82GB/s vs 13.9GB/s)
Higher Frequency (2300MHz vs 2000MHz)