AMD EPYC 9554 's Advantages
Higher specification of memory (4800 vs 3200)
Newer PCIe version (5 vs 4)
Higher base frequency (3.1GHz vs 2GHz)
More modern manufacturing process (5nm vs 7nm)
AMD EPYC 7663P 's Advantages
Released 10 months late
Lower TDP (240W vs 360W)