Xeon EC5509 's Advantages
Lower TDP (85W vs 250W)
Xeon 6746E 's Advantages
Released 14 years and 4 months late
Higher specification of memory (5600 vs 1066)
Newer PCIe version (5 vs 2)
Larger L3 cache size (96MB vs 8MB)
More modern manufacturing process (5nm vs 45nm)