MediaTek Helio P70 Advantages
More modern manufacturing process (12nm vs 14nm)
Lower TDP (5W vs 11W)
Released 2 years and 11 months late
Qualcomm Snapdragon 820 Advantages
Better graphics card performance FLOPS (0.3194 TFLOPS vs 0.0972 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 13.41GB/s)
Higher Frequency (2150MHz vs 2100MHz)