Xeon E7530 's Advantages
Lower TDP (105W vs 250W)
Xeon 6766E 's Advantages
Released 14 years and 3 months late
Higher specification of memory (6400 vs 1333)
Newer PCIe version (5 vs 2)
Higher base frequency (1.9GHz vs 1.866GHz)
Larger L3 cache size (108MB vs 12MB)
More modern manufacturing process (5nm vs 45nm)