Xeon EC5539 's Advantages
Higher specification of memory (1333 vs 4)
Lower TDP (65W vs 84W)
Intel Xeon E3 1285 v3 's Advantages
Released 3 years and 4 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.6GHz vs 2.266GHz)
Larger L3 cache size (8MB vs 4MB)
More modern manufacturing process (22nm vs 45nm)