MediaTek Helio X30 Advantages
Lower TDP (5W vs 9W)
Samsung Exynos 9820 Advantages
Better graphics card performance FLOPS (0.607 TFLOPS vs 0.2176 TFLOPS )
Larger memory bandwidth (33.4GB/s vs 27.81GB/s)
Higher Frequency (2730MHz vs 2600MHz)
More modern manufacturing process (8nm vs 10nm)
Released 1 years and 9 months late