Apple A9 Advantages
Lower TDP (5W vs 6W)
Samsung Exynos 1280 Advantages
Better graphics card performance FLOPS (0.487 TFLOPS vs 0.2496 TFLOPS )
Larger memory bandwidth (17GB/s vs 14.9GB/s)
Higher Frequency (2400MHz vs 1850MHz)
More modern manufacturing process (5nm vs 14nm)
Released 6 years and 6 months late