Samsung Exynos 7870 Advantages
Lower TDP (3W vs 5W)
Qualcomm Snapdragon 439 Advantages
Better graphics card performance FLOPS (0.0432 TFLOPS vs 0.0224 TFLOPS )
Higher Frequency (2000MHz vs 1600MHz)
More modern manufacturing process (12nm vs 14nm)
Released 2 years and 4 months late