Intel Xeon E5 2667 v2 's Advantages
Released 2 years and 5 months late
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E3 1275 's Advantages
Higher base frequency (3.4GHz vs 3.3GHz)
Lower TDP (95W vs 130W)