Qualcomm Snapdragon 685 Advantages
Larger memory bandwidth (17GB/s vs 14.9GB/s)
Higher Frequency (2800MHz vs 1850MHz)
More modern manufacturing process (6nm vs 14nm)
Released 7 years and 6 months late
Apple A9 Advantages
Better graphics card performance FLOPS (0.2496 TFLOPS vs 0.2432 TFLOPS )