AMD EPYC 7401 's Advantages
Lower TDP (170W vs 200W)
AMD EPYC 9135 's Advantages
Released 7 years and 4 months late
Higher specification of memory (6000 vs 2666)
Newer PCIe version (5 vs 3)
Higher base frequency (3.65GHz vs 2GHz)
More modern manufacturing process (4nm vs 14nm)