Opteron 4340 's Advantages
Higher base frequency (3.5GHz vs 2.2GHz)
Lower TDP (95W vs 200W)
EPYC 7552 's Advantages
Released 6 years and 8 months late
Higher specification of memory (3200 vs 3)
Larger L3 cache size (192MB vs 8MB)
More modern manufacturing process (7nm vs 32nm)