I like my theory that Patterson had more than one take, and the suit he gave BH to wear just didn't look right on film. That is, BH did wear a suit like he described for Roger, but BH's performance was cut from the final movie in favor of a different suit and actor.

Who gets a hoax film just right on the first take?
That's cool, and I don't have a slam dunk rebuttal (coming from a guy that thinks BH was the only dude in a one-take filming).
All I can do is ask you a question and also offer a speculation.
Creating a baseline uderstanding that leads to my question: You think that BH did wear a suit and was filmed by Patterson. You further think that some other guy (we'll call him Joe Blow) also wore a suit and was filmed by Patterson. RP had the opportunity to make a choice between the two actors and chose Joe Blow instead of BH. The on-screen acting and movements of BH and JB are so similar that BH can't automatically know that he wasn't really the guy in the suit when he watches the PGF (even if he never ever knew, and still doesn't know about JB).
My question (I guess there are multiple questions here): Do you think that BH wore a suit and was filmed by Patterson and yet is essentially innocently naive to the fact that RP also filmed Joe Blow and used his take instead? I'm asking if you think BH is simply wrong, instead of knowingly lying. If BH has any clue that there was a Joe Blow (a guy that was filmed by RP just like he was), then he ought not to be so confident that the Patty we all see is him instead of JB. If BH even knows or could possibly speculate that there was a Joe Blow, then why doesn't he mention this?
My speculation: Bob Heironimus is confidently claiming to be Patty because he knows that he was Patty. He knows this because he wore the suit for Roger and when he finally got to see the PGF he could see that it was him after all. Bob understood that Roger planned a hoax, executed it using him, and then went on marketing it to the world as if it were real.
If Patty was Joe Blow instead of Bob Heironimus, then there is a situation worth mentioning. Joe Blow must be a real person. Is he alive or dead? Is he watching BH make all of these declarative claims in the press to being Patty? Does he not have any interest in making a confession himself that would override BH? It seems to me that BH is riding some kind of confidence wave that allows him to feel that Joe Blow won't come out of the woodwork and say that he is wrong. If Joe Blow exists but BH never ever knew about him... why don't we hear from this Joe Blow? Does he have a real and important reason to stay silent after all of the things that BH has said? I mean, if JB came out and confessed, it wouldn't necessarily label BH as a fabricating liar. He could say that we obviously were both actors for Patterson, and he eventually decided to use my take instead of yours. Bob, I understand why you think you were Patty because Roger had us both do the essentially same thing out on the sandbar. Joe is then going to have to point out why he
knows it was his take that was used, instead of the one with BH.
Who is Joe Blow? Is it Bob Gimlin?