Xeon X3470 's Advantages
Higher specification of memory (1333 vs 3)
Intel Xeon E3 1225 v2 's Advantages
Released 2 years and 8 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.2GHz vs 2.933GHz)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (77W vs 95W)