Intel Xeon E5 2666 v3 's Advantages
Lower TDP (135W vs 205W)
Intel Xeon Gold 6354 's Advantages
Released 6 years and 5 months late
Higher specification of memory (DDR4-3200 vs DDR4-2133)
Newer PCIe version (4 vs 3)
Higher base frequency (3GHz vs 2.9GHz)
Larger L3 cache size (39MB vs 25MB)
More modern manufacturing process (10nm vs 22nm)