Samsung Exynos 7870 Advantages
Lower TDP (3W vs 5W)
MediaTek Helio P90 Advantages
Better graphics card performance FLOPS (0.1552 TFLOPS vs 0.0224 TFLOPS )
Higher Frequency (2200MHz vs 1600MHz)
More modern manufacturing process (12nm vs 14nm)
Released 2 years and 9 months late