Xeon E5530 's Advantages
Higher base frequency (2.4GHz vs 2.1GHz)
Lower TDP (80W vs 270W)
Intel Xeon Gold 6538N 's Advantages
Released 14 years and 9 months late
Higher specification of memory (5200 vs 1066)
Newer PCIe version (5 vs 2)
Larger L3 cache size (60MB vs 8MB)
More modern manufacturing process (10nm vs 45nm)