Intel Xeon E5 2652 v3 's Advantages
Released 3 years and 7 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (25MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5649 's Advantages
Higher base frequency (2.533GHz vs 2.3GHz)
Lower TDP (80W vs 105W)