Qualcomm Snapdragon 425 Advantages
Lower TDP (5W vs 9W)
Samsung Exynos 9820 Advantages
Better graphics card performance FLOPS (0.607 TFLOPS vs 0.024 TFLOPS )
Larger memory bandwidth (33.4GB/s vs 5.34GB/s)
Higher Frequency (2730MHz vs 1400MHz)
More modern manufacturing process (8nm vs 28nm)
Released 2 years and 9 months late