Intel Xeon E5 2620 v2 's Advantages
Released 3 years and 7 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (15MB vs 4MB)
More modern manufacturing process (22nm vs 45nm)
Xeon EC5539 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.266GHz vs 2.1GHz)
Lower TDP (65W vs 80W)