Qualcomm Snapdragon 820 Advantages
Better graphics card performance FLOPS (0.3194 TFLOPS vs 0.0704 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 7.46GB/s)
Samsung Exynos 7885 Advantages
Higher Frequency (2200MHz vs 2150MHz)
Lower TDP (8W vs 11W)
Released 2 years and 3 months late