MediaTek Helio A25 Advantages
Larger memory bandwidth (13.9GB/s vs 7.46GB/s)
More modern manufacturing process (12nm vs 14nm)
Released 2 years and 4 months late
Qualcomm Snapdragon 625 Advantages
Better graphics card performance FLOPS (0.1248 TFLOPS vs 0.0416 TFLOPS )
Higher Frequency (2000MHz vs 1800MHz)