MediaTek MT6739 Advantages
Released 1 years and 10 months late
Samsung Exynos 8890 Advantages
Better graphics card performance FLOPS (0.2496 TFLOPS vs 0.0091 TFLOPS )
Larger memory bandwidth (26.82GB/s vs 6.4GB/s)
Higher Frequency (2300MHz vs 1500MHz)
More modern manufacturing process (14nm vs 28nm)