Opteron 6278 's Advantages
Higher base frequency (2.4GHz vs 2.25GHz)
Lower TDP (115W vs 290W)
AMD EPYC 9634 's Advantages
Released 10 years and 6 months late
Higher specification of memory (DDR5-4800 vs DDR3)
Newer PCIe version (5 vs 2)
Larger L3 cache size (384MB vs 8MB)
More modern manufacturing process (5nm vs 32nm)