Opteron 4340 's Advantages
Higher base frequency (3.5GHz vs 2.4GHz)
Lower TDP (95W vs 130W)
AMD EPYC 7303 's Advantages
Released 10 years and 9 months late
Higher specification of memory (3200 vs 3)
Larger L3 cache size (64MB vs 8MB)
More modern manufacturing process (7nm vs 32nm)