Intel Xeon Silver 4309Y 's Advantages
Higher base frequency (2.8GHz vs 2GHz)
Lower TDP (105W vs 205W)
Intel Xeon Gold 5420 's Advantages
Released 1 years and 9 months late
Higher specification of memory (4400 vs 2667)
Newer PCIe version (5 vs 4)
Larger L3 cache size (52.5MB vs 12MB)