Intel Xeon E3 1225 's Advantages
Higher base frequency (3.1GHz vs 2.5GHz)
Lower TDP (95W vs 115W)
Intel Xeon E5 2670 v2 's Advantages
Released 2 years and 5 months late
Larger L3 cache size (25MB vs 6MB)
More modern manufacturing process (22nm vs 32nm)