AMD EPYC 7542 's Advantages
Lower TDP (225W vs 280W)
AMD EPYC 9355 's Advantages
Released 5 years and 2 months late
Higher specification of memory (6000 vs 3200)
Newer PCIe version (5 vs 4)
Higher base frequency (3.55GHz vs 2.9GHz)
Larger L3 cache size (256MB vs 128MB)
More modern manufacturing process (4nm vs 7nm)