AMD EPYC 9684X 's Advantages
Released 5 years and 4 months late
Higher specification of memory (DDR5-4800 vs DDR4-2666)
Newer PCIe version (5 vs 3)
Higher base frequency (2.55GHz vs 2.5GHz)
Larger L3 cache size (1152MB vs 16MB)
More modern manufacturing process (5nm vs 14nm)
AMD EPYC Embedded 3255 's Advantages
Lower TDP (55W vs 400W)