Intel Xeon E 2124 's Advantages
Higher base frequency (3.4GHz vs 2GHz)
Lower TDP (72W vs 205W)
Intel Xeon Gold 5420 's Advantages
Released 4 years and 8 months late
Higher specification of memory (DDR5-4400 vs DDR4)
Newer PCIe version (5 vs 3)
Larger L3 cache size (52.5MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)