Intel Xeon E5 1660 v2 's Advantages
Released 10 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.7GHz vs 1.8GHz)
Larger L3 cache size (15MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Opteron 6366 HE 's Advantages
Lower TDP (85W vs 130W)