Apple A9 Advantages
Lower TDP (5W vs 9W)
Qualcomm Snapdragon 670 Advantages
Better graphics card performance FLOPS (0.3584 TFLOPS vs 0.2496 TFLOPS )
Higher Frequency (2000MHz vs 1850MHz)
More modern manufacturing process (10nm vs 14nm)
Released 2 years and 11 months late