Intel Xeon E5 2670 's Advantages
Lower TDP (115W vs 130W)
Intel Xeon E5 2690 v2 's Advantages
Released 1 years and 6 months late
Higher base frequency (3GHz vs 2.6GHz)
Larger L3 cache size (25MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)