Qualcomm Snapdragon 660 Advantages
Better graphics card performance FLOPS (0.2176 TFLOPS vs 0.1536 TFLOPS )
Higher Frequency (2200MHz vs 1800MHz)
More modern manufacturing process (14nm vs 28nm)
Lower TDP (5W vs 7W)
Released 2 years and 3 months late
Qualcomm Snapdragon 652 Advantages
Larger memory bandwidth (14.9GB/s vs 13.9GB/s)