Apple A9 Advantages
Lower TDP (5W vs 6W)
MediaTek Dimensity 8000 Advantages
Better graphics card performance FLOPS (1.309 TFLOPS vs 0.2496 TFLOPS )
Larger memory bandwidth (51.2GB/s vs 14.9GB/s)
Higher Frequency (2750MHz vs 1850MHz)
More modern manufacturing process (5nm vs 14nm)
Released 6 years and 6 months late