Intel Xeon E3 1280 v2 's Advantages
Newer PCIe version (3 vs 2)
Higher base frequency (3.6GHz vs 1.8GHz)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (69W vs 85W)
Opteron 6366 HE 's Advantages
Released 6 months late
Higher specification of memory (1866 vs 3)