Intel Xeon E5 4620 v3 's Advantages
Lower TDP (105W vs 210W)
Xeon w7 2555X 's Advantages
Released 9 years and 2 months late
Higher specification of memory (4800 vs 1866)
Newer PCIe version (5 vs 3)
Higher base frequency (3.3GHz vs 2GHz)
Larger L3 cache size (33.75MB vs 25MB)
More modern manufacturing process (10nm vs 22nm)