Intel Xeon E5 2666 v3 's Advantages
Released 6 years and 2 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 45nm)
Xeon X5470 's Advantages
Higher base frequency (3.333GHz vs 2.9GHz)
Lower TDP (120W vs 135W)