I am going thru a big bore build right now and am going stay completetly generic on this question. In researching my head options, I have looked at several porters work. Some are mirror finish combustion chambers, smooth intake ( emery finish ) with no noticeable humps and bumps in the ports etc and some are actually quite rough in my opinion. All are top of the shelf porters and all highly recommended. My question is, what is the benifit to the smooth almost art work type porting that brand A offers versus the more noticeably hand worked ports of brand B ? None of my choices were NC cut versions and all claim big gains. Is the only benefit visual upon opening the package? I know that in the auotmotive performance world horsepower is not always pretty. Same goes here?