Unisoc T820 Advantages
More modern manufacturing process (6nm vs 8nm)
Released 4 years late
Samsung Exynos 9820 Advantages
Better graphics card performance FLOPS (0.607 TFLOPS vs 0.4352 TFLOPS )
Larger memory bandwidth (33.4GB/s vs 17.07GB/s)
Higher Frequency (2730MHz vs 2700MHz)