Intel Xeon E5 2609 v2 's Advantages
Higher base frequency (2.5GHz vs 2GHz)
Lower TDP (80W vs 205W)
Intel Xeon Gold 5420 's Advantages
Released 9 years and 4 months late
Higher specification of memory (4400 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (52.5MB vs 10MB)
More modern manufacturing process (10nm vs 22nm)