MediaTek Helio A25 Advantages
Lower TDP (5W vs 6W)
Qualcomm Snapdragon 690 Advantages
Better graphics card performance FLOPS (0.4864 TFLOPS vs 0.0416 TFLOPS )
Larger memory bandwidth (14.9GB/s vs 13.9GB/s)
Higher Frequency (2000MHz vs 1800MHz)
More modern manufacturing process (8nm vs 12nm)
Released 2 years late