Xeon EC5509 's Advantages
Lower TDP (85W vs 130W)
Intel Xeon E5 1650 v2 's Advantages
Released 3 years and 7 months late
Higher specification of memory (1866 vs 1066)
Newer PCIe version (3 vs 2)
Higher base frequency (3.5GHz vs 2GHz)
Larger L3 cache size (12MB vs 8MB)
More modern manufacturing process (22nm vs 45nm)