Samsung Exynos 8890 Advantages
Better graphics card performance FLOPS (0.2496 TFLOPS vs 0.0918 TFLOPS )
Larger memory bandwidth (26.82GB/s vs 11.9GB/s)
Higher Frequency (2300MHz vs 2200MHz)
Lower TDP (5W vs 9W)
Samsung Exynos 9609 Advantages
More modern manufacturing process (10nm vs 14nm)
Released 3 years and 6 months late