Xeon EC5509 's Advantages
Higher specification of memory (1066 vs 3)
Lower TDP (85W vs 130W)
Intel Xeon E5 2697 v2 's Advantages
Released 3 years and 7 months late
Newer PCIe version (3 vs 2)
Higher base frequency (2.7GHz vs 2GHz)
Larger L3 cache size (30MB vs 8MB)
More modern manufacturing process (22nm vs 45nm)