EDIT: actually, now that I think about it some more, my characterization of Zen-C cores as the same "idea" as Intel E-cores was pretty unfair too; they do serve the same market idea but the implementation is so much less silly that it's a bit daft to compare them. Intel E-Cores have different IPC, different tuning characteristics, and different feature support (ie, they are usually a different uarch) which makes them really annoying to deal with. Zen C cores are usually the same cores with less cache and sometimes fewer or narrower ports depending on the specific configuration.
https://www.techpowerup.com/forums/threads/amd-zen-6-epyc-ve...
EDIT: actually, now that I think about it some more, my characterization of Zen-C cores as the same "idea" as Intel E-cores was pretty unfair too; they do serve the same market idea but the implementation is so much less silly that it's a bit daft to compare them. Intel E-Cores have different IPC, different tuning characteristics, and different feature support (ie, they are usually a different uarch) which makes them really annoying to deal with. Zen C cores are usually the same cores with less cache and sometimes fewer or narrower ports depending on the specific configuration.