Intel Xeon E5 2603 v3 's Advantages
Released 4 years and 7 months late
Higher specification of memory (1600 vs 1333)
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 base frequency (2.266GHz vs 1.6GHz)
Lower TDP (65W vs 85W)