MediaTek Helio A25 Advantages
More modern manufacturing process (12nm vs 14nm)
Released 2 years and 9 months late
Apple A9 Advantages
Better graphics card performance FLOPS (0.2496 TFLOPS vs 0.0416 TFLOPS )
Larger memory bandwidth (14.9GB/s vs 13.9GB/s)
Higher Frequency (1850MHz vs 1800MHz)