Samsung Exynos 7870 's Advantages
Lower TDP (3W vs 5W)
MediaTek Helio A25 's Advantages
Better graphics card performance FLOPS (0.0416 TFLOPS vs 0.0224 TFLOPS )
Higher Frequency (1800MHz vs 1600MHz)
More modern manufacturing process (12nm vs 14nm)
Released 2 years and 4 months late