AMD EPYC 9254 's Advantages
Higher specification of memory (4800 vs 3200)
Newer PCIe version (5 vs 4)
Higher base frequency (2.9GHz vs 2GHz)
More modern manufacturing process (5nm vs 7nm)
Lower TDP (200W vs 240W)
AMD EPYC 7663P 's Advantages
Released 10 months late
Larger L3 cache size (256MB vs 128MB)