Xeon E 2456 's Advantages
Higher base frequency (3.3GHz vs 2.25GHz)
Lower TDP (80W vs 500W)
AMD EPYC 9965 's Advantages
Released 10 months late
Higher specification of memory (6000 vs 4800)
Larger L3 cache size (384MB vs 18MB)
More modern manufacturing process (3nm vs 10nm)