AMD EPYC 7643 's Advantages
Higher base frequency (2.3GHz vs 2.2GHz)
Larger L3 cache size (256MB vs 97.5MB)
More modern manufacturing process (7nm vs 10nm)
Lower TDP (225W vs 340W)
Xeon w9 3575X 's Advantages
Released 3 years and 5 months late
Higher specification of memory (4800 vs 3200)
Newer PCIe version (5 vs 4)