Intel Xeon E5606 's Advantages
Lower TDP (80W vs 135W)
Intel Xeon E5 2637 v3 's Advantages
Released 3 years and 7 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Newer PCIe version (3 vs 2)
Higher base frequency (3.5GHz vs 2.133GHz)
Larger L3 cache size (15MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)