Xeon EC5539 's Advantages
Higher base frequency (2.266GHz vs 2.2GHz)
Lower TDP (65W vs 200W)
EPYC 7552 's Advantages
Released 9 years and 6 months late
Higher specification of memory (3200 vs 1333)
Newer PCIe version (4 vs 2)
Larger L3 cache size (192MB vs 4MB)
More modern manufacturing process (7nm vs 45nm)