MediaTek Helio G99 Advantages
More modern manufacturing process (6nm vs 8nm)
Lower TDP (5W vs 9W)
Released 3 years and 6 months late
Samsung Exynos 9820 Advantages
Better graphics card performance FLOPS (0.607 TFLOPS vs 0.2816 TFLOPS )
Larger memory bandwidth (33.4GB/s vs 17.1GB/s)
Higher Frequency (2730MHz vs 2200MHz)