Apple A17 Pro Advantages
Better graphics card performance FLOPS (2.1472 TFLOPS vs 0.2496 TFLOPS )
Larger memory bandwidth (51.2GB/s vs 14.9GB/s)
Higher Frequency (3780MHz vs 1850MHz)
More modern manufacturing process (3nm vs 14nm)
Released 8 years late
Apple A9 Advantages
Lower TDP (5W vs 8W)