Intel Xeon E5 2670 's Advantages
Higher base frequency (2.6GHz vs 2.2GHz)
Intel Xeon E5 2660 v2 's Advantages
Released 1 years and 6 months late
Larger L3 cache size (25MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (95W vs 115W)