Intel Xeon E5 1650 v3 Advantages
Higher base frequency (3.5GHz vs 2.3GHz)
Lower TDP (140W vs 215W)
Xeon 6556P B Advantages
Released 10 years and 5 months late
Higher specification of memory (6400 vs 2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (144MB vs 15MB)
More modern manufacturing process (5nm vs 22nm)