Qualcomm Snapdragon 425 Advantages
Lower TDP (5W vs 9W)
Qualcomm Snapdragon 845 Advantages
Better graphics card performance FLOPS (0.727 TFLOPS vs 0.024 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 5.34GB/s)
Higher Frequency (2800MHz vs 1400MHz)
More modern manufacturing process (10nm vs 28nm)
Released 1 years and 10 months late