Intel Xeon E3 1265L v4 's Advantages
Higher base frequency (2.3GHz vs 1.9GHz)
Lower TDP (35W vs 250W)
Xeon 6766E 's Advantages
Released 9 years late
Higher specification of memory (6400 vs 1866)
Newer PCIe version (5 vs 3)
Larger L3 cache size (108MB vs 6MB)
More modern manufacturing process (5nm vs 14nm)