AMD EPYC 7451 's Advantages
Released 7 years and 3 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.3GHz vs 2GHz)
Larger L3 cache size (64MB vs 4MB)
Intel Xeon E5503 's Advantages
Lower TDP (80W vs 180W)