Intel Xeon E5 2666 v3 's Advantages
Larger L3 cache size (25MB vs 22.5MB)
Lower TDP (135W vs 195W)
Intel Xeon Gold 6434 's Advantages
Released 8 years and 2 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Higher base frequency (3.7GHz vs 2.9GHz)
More modern manufacturing process (10nm vs 22nm)