Qualcomm Snapdragon 439 Advantages
Lower TDP (5W vs 8W)
MediaTek Dimensity 820 Advantages
Better graphics card performance FLOPS (0.416 TFLOPS vs 0.0432 TFLOPS )
Larger memory bandwidth (17.07GB/s vs 6.4GB/s)
Higher Frequency (2600MHz vs 2000MHz)
More modern manufacturing process (7nm vs 12nm)
Released 1 years and 11 months late