Intel Xeon E5 2669 v3 's Advantages
Higher base frequency (2.3GHz vs 1.9GHz)
Lower TDP (120W vs 250W)
Xeon 6766E 's Advantages
Released 9 years and 5 months late
Higher specification of memory (6400 vs 2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (108MB vs 30MB)
More modern manufacturing process (5nm vs 22nm)