Opteron 8218 (F3) 's Advantages
Higher base frequency (2.6GHz vs 2.133GHz)
Xeon L5639 's Advantages
Released 4 years and 6 months late
Higher specification of memory (1333 vs 667)
Newer PCIe version (2 vs 1)
More modern manufacturing process (32nm vs 90nm)
Lower TDP (60W vs 95W)