Intel Xeon E5 2667 's Advantages
Higher base frequency (2.9GHz vs 2GHz)
Lower TDP (130W vs 135W)
Intel Xeon E5 4667 v3 's Advantages
Released 3 years and 3 months late
Higher specification of memory (2133 vs 3)
Larger L3 cache size (40MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)