Opteron 8218 (F3) 's Advantages
Higher base frequency (2.6GHz vs 2.533GHz)
Xeon EC5549 's Advantages
Released 3 years and 6 months late
Higher specification of memory (1333 vs 667)
Newer PCIe version (2 vs 1)
More modern manufacturing process (45nm vs 90nm)
Lower TDP (85W vs 95W)