Intel Xeon E5607 's Advantages
Lower TDP (80W vs 140W)
Intel Xeon E5 1607 v3 's Advantages
Released 3 years and 7 months late
Higher specification of memory (DDR4-1866 vs DDR3)
Newer PCIe version (3 vs 2)
Higher base frequency (3.1GHz vs 2.266GHz)
Larger L3 cache size (10MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)