Xeon EC5509 's Advantages
Lower TDP (85W vs 120W)
Intel Xeon E5 2669 v3 's Advantages
Released 4 years and 11 months late
Higher specification of memory (2133 vs 1066)
Newer PCIe version (3 vs 2)
Higher base frequency (2.3GHz vs 2GHz)
Larger L3 cache size (30MB vs 8MB)
More modern manufacturing process (22nm vs 45nm)