Qualcomm Snapdragon 801 Advantages
Lower TDP (6W vs 8W)
MediaTek Dimensity 820 Advantages
Better graphics card performance FLOPS (0.416 TFLOPS vs 0.148 TFLOPS )
Larger memory bandwidth (17.07GB/s vs 14.9GB/s)
Higher Frequency (2600MHz vs 2500MHz)
More modern manufacturing process (7nm vs 28nm)
Released 6 years and 3 months late