Qualcomm Snapdragon 430 Advantages
Lower TDP (6W vs 8W)
MediaTek Dimensity 820 Advantages
Better graphics card performance FLOPS (0.416 TFLOPS vs 0.0432 TFLOPS )
Higher Frequency (2600MHz vs 1400MHz)
More modern manufacturing process (7nm vs 28nm)
Released 4 years and 8 months late