Qualcomm Snapdragon 480 Advantages
More modern manufacturing process (8nm vs 10nm)
Lower TDP (3W vs 9W)
Released 3 years and 1 months late
Qualcomm Snapdragon 845 Advantages
Better graphics card performance FLOPS (0.727 TFLOPS vs 0.4224 TFLOPS )
Larger memory bandwidth (29.8GB/s vs 17GB/s)
Higher Frequency (2800MHz vs 2000MHz)