AMD EPYC 7251 's Advantages
Released 7 years and 4 months late
Higher specification of memory (2400 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (32MB vs 4MB)
More modern manufacturing process (14nm vs 45nm)
Xeon EC5539 's Advantages
Higher base frequency (2.266GHz vs 2.1GHz)
Lower TDP (65W vs 120W)