Intel Xeon E5606 's Advantages
Lower TDP (80W vs 130W)
Intel Xeon E5 2690 v2 's Advantages
Released 2 years and 7 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3GHz vs 2.133GHz)
Larger L3 cache size (25MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)