Qualcomm Snapdragon 660 Advantages
Higher Frequency (2200MHz vs 2000MHz)
Qualcomm Snapdragon 480 Advantages
Better graphics card performance FLOPS (0.4224 TFLOPS vs 0.2176 TFLOPS )
Larger memory bandwidth (17GB/s vs 13.9GB/s)
More modern manufacturing process (8nm vs 14nm)
Lower TDP (3W vs 5W)
Released 3 years and 8 months late