MediaTek Helio G99 Advantages
More modern manufacturing process (6nm vs 10nm)
Released 4 years and 4 months late
Samsung Exynos 9810 Advantages
Better graphics card performance FLOPS (0.3706 TFLOPS vs 0.2816 TFLOPS )
Larger memory bandwidth (28.7GB/s vs 17.1GB/s)
Higher Frequency (2900MHz vs 2200MHz)