Opteron 6344 's Advantages
Higher base frequency (2.6GHz vs 2GHz)
Lower TDP (115W vs 170W)
AMD EPYC 7401P 's Advantages
Released 4 years and 7 months late
Higher specification of memory (2666 vs 1866)
Newer PCIe version (3 vs 2)
Larger L3 cache size (64MB vs 8MB)
More modern manufacturing process (14nm vs 32nm)