Xeon EC5539 's Advantages
Higher specification of memory (1333 vs 3)
Intel Xeon E3 1220L v2 's Advantages
Released 2 years and 3 months late
Newer PCIe version (3 vs 2)
Higher base frequency (2.3GHz vs 2.266GHz)
Larger L3 cache size (8MB vs 4MB)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (17W vs 65W)