Xeon L5639 's Advantages
Released 4 years 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 68W)
Opteron 8218 HE 's Advantages
Higher base frequency (2.6GHz vs 2.133GHz)