Opteron 4340 's Advantages
Higher base frequency (3.5GHz vs 2.1GHz)
Lower TDP (95W vs 390W)
AMD EPYC 9845 's Advantages
Released 11 years and 10 months late
Higher specification of memory (6000 vs 3)
Larger L3 cache size (320MB vs 8MB)
More modern manufacturing process (3nm vs 32nm)