Xeon E 2456 's Advantages
Higher base frequency (3.3GHz vs 2.6GHz)
Lower TDP (80W vs 400W)
AMD EPYC 9655P 's Advantages
Released 10 months late
Higher specification of memory (6000 vs 4800)
Larger L3 cache size (384MB vs 18MB)
More modern manufacturing process (4nm vs 10nm)