Intel Xeon E5 2650L v2 's Advantages
Released 3 years and 6 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (25MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (70W vs 80W)
Intel Xeon E5640 's Advantages
Higher base frequency (2.666GHz vs 1.7GHz)