Qualcomm Snapdragon 650 Advantages
Better graphics card performance FLOPS (0.1536 TFLOPS vs 0.1152 TFLOPS )
Larger memory bandwidth (14.9GB/s vs 7.46GB/s)
Qualcomm Snapdragon 450 Advantages
More modern manufacturing process (14nm vs 28nm)
Lower TDP (3W vs 9W)
Released 2 years and 4 months late