Super Hot is the lowest level of Hot Stampers. The thing about vinyl, quality does vary from copy to copy. There'e nothing magical about a Hot Stamper. They do after all come from the same pool of records as everyone else has. So odds are any given record in your collection could be Hot Stamper quality. In other words just because you have a random copy does not mean you have an average copy. Could be better, could be worse.
The one Super Hot that I have is clearly a better than average copy, but its not rock your world better. White Hot, pretty much all of them are. Some of them- Tom Petty Souther Accents, Nilsson Schmilsson, Rumours- are absolute knockouts. Had a Audiogoner over he compared WH Rumors to 45, not even close.
Not familiar with Yes. But you said you purposely chose average not exceptional recordings. That probably would have a lot to do with it. I have a White Hot Beatles Help and it sounds great, but it is what it is if you know what I mean. The better recordings tend to make for better Hot Stampers.
In any case that's what they have the return for!😁