Intel Xeon E5 2666 v3 's Advantages
Higher base frequency (2.9GHz vs 2.8GHz)
Larger L3 cache size (25MB vs 12MB)
Intel Xeon Silver 4309Y 's Advantages
Released 6 years and 5 months late
Higher specification of memory (2667 vs 2133)
Newer PCIe version (4 vs 3)
More modern manufacturing process (10nm vs 22nm)
Lower TDP (105W vs 135W)