Xeon E7530 's Advantages
Higher specification of memory (1333 vs 3)
Lower TDP (105W vs 130W)
Intel Xeon E5 2643 v2 's Advantages
Released 3 years and 6 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.5GHz vs 1.866GHz)
Larger L3 cache size (15MB vs 12MB)
More modern manufacturing process (22nm vs 45nm)