Samsung Exynos 7884B Advantages
Lower TDP (5W vs 6W)
Released 9 months late
Qualcomm Snapdragon 855 Advantages
Better graphics card performance FLOPS (0.8985 TFLOPS vs 0.0493 TFLOPS )
Larger memory bandwidth (34.13GB/s vs 7.8GB/s)
Higher Frequency (2840MHz vs 1560MHz)
More modern manufacturing process (7nm vs 14nm)