Xeon L5639 's Advantages
Larger L3 cache size (12MB vs 10MB)
Lower TDP (60W vs 130W)
Intel Xeon E5 1607 v2 's Advantages
Released 2 years and 7 months late
Higher specification of memory (1600 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (3GHz vs 2.133GHz)
More modern manufacturing process (22nm vs 32nm)