Samsung Exynos 9810 Advantages
Higher Frequency (2900MHz vs 2730MHz)
Lower TDP (5W vs 9W)
Samsung Exynos 990 Advantages
Better graphics card performance FLOPS (1.126 TFLOPS vs 0.3706 TFLOPS )
Larger memory bandwidth (44GB/s vs 28.7GB/s)
More modern manufacturing process (7nm vs 10nm)
Released 1 years and 9 months late