Extruded vs molded seals which are better

Fellow addicts, though I am nowhere near this stage yet I keep seeing sets of seals of both types on auction. This prompted my question.

Those of you who have either, please comment on the efficacy and if anyone out there in resto-land is tuned in, perhaps you have a preference.

Mind you. I’m not going to get either for quite a while until I’m there, but I am curious.

Thanks, Brian