Qualcomm Snapdragon 450 Advantages
More modern manufacturing process (14nm vs 28nm)
Lower TDP (3W vs 6W)
Released 3 years and 4 months late
Qualcomm Snapdragon 801 Advantages
Better graphics card performance FLOPS (0.148 TFLOPS vs 0.1152 TFLOPS )
Larger memory bandwidth (14.9GB/s vs 7.46GB/s)
Higher Frequency (2500MHz vs 1800MHz)