Samsung Exynos 8890 Advantages
Larger memory bandwidth (26.82GB/s vs 14.9GB/s)
Higher Frequency (2300MHz vs 2000MHz)
Lower TDP (5W vs 9W)
Qualcomm Snapdragon 670 Advantages
Better graphics card performance FLOPS (0.3584 TFLOPS vs 0.2496 TFLOPS )
More modern manufacturing process (10nm vs 14nm)
Released 2 years and 9 months late