Xeon X5570 's Advantages
Higher specification of memory (1333 vs 3)
Lower TDP (95W vs 130W)
Intel Xeon E5 2667 v2 's Advantages
Released 4 years and 6 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.3GHz vs 2.933GHz)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (22nm vs 45nm)