Scotty probably has more memories with the refit version of NCC-1701 than the original
Irrelevant when we see
what he has deliberately chosen as his preferred mode of entertainment.
Unless we speculate that he really wanted the refit -nil, and didn't have the guts to contradict the computer when he realized he had not been sufficiently specific. But that doesn't sound like our engineer at all, especially not when he's loaded.
I don't believe this is a fact at all.
Decker did, and Kirk showed him to be right. Any connection between the two incarnations of NCC-1701 is semantic at best.
Scotty specifically asks Picard "You're familiar with them?", as regards the Constitution
class. Picard doesn't say yes, but he says there is one in the museum. If Scotty takes that for a yes, and the museum piece is a refit, then he's being had. And if Picard intends for this to happen, he's lying for a cause.