Qualcomm Snapdragon 460 Advantages
Lower TDP (3W vs 6W)
Released 1 years and 1 months late
Qualcomm Snapdragon 855 Advantages
Better graphics card performance FLOPS (0.8985 TFLOPS vs 0.1536 TFLOPS )
Larger memory bandwidth (34.13GB/s vs 13.91GB/s)
Higher Frequency (2840MHz vs 1800MHz)
More modern manufacturing process (7nm vs 11nm)