I can't see it either. Sure, there's a physical resemblance in those photos, but personality-wise, I don't see it. My image of Burt Reynolds was formed in the '70s.
I kind of had my image broken by lack of presence and then reset by his reappearance starting in the mid to late 90's.
Well, sure he looks like him, but I just don't see him as the Vaughn type.
If you have not seen either Boogie Nights or Mystery Alaska I'd recommend giving them a look. They both informed my casting of Reynold's as Vaughn especially the latter movie.