MediaTek Helio A25 Advantages
Lower TDP (5W vs 8W)
Released 9 months late
Apple A11 Bionic Advantages
Better graphics card performance FLOPS (0.4093 TFLOPS vs 0.0416 TFLOPS )
Larger memory bandwidth (34.1GB/s vs 13.9GB/s)
Higher Frequency (2390MHz vs 1800MHz)
More modern manufacturing process (10nm vs 12nm)