Xeon E7520 's Advantages
Lower TDP (95W vs 270W)
Intel Xeon Platinum 8581V 's Advantages
Released 13 years and 9 months late
Higher specification of memory (4800 vs 1333)
Newer PCIe version (5 vs 2)
Higher base frequency (2GHz vs 1.866GHz)
Larger L3 cache size (300MB vs 18MB)
More modern manufacturing process (10nm vs 45nm)