The first "red flag" for me would be the reeded edge on that "so-called" Bust Dollar. They didn't start using reeded edge on silver dollars until around 1836.
Yes the denticles stand out as wrong immediately too. I'd also suggest you show the edge lettering on these fakes as that is another really good giveaway. This particular one doesn't have edge lettering but I've seen some that do and it's generally pretty far off.
A client of mine gave me three of these coins. They happen to have lettering on the rim but not centered. Plus the coins look and feel pretty worn like a regular quarter. I sent a picture of the coins to a coin dealer online and was informed that they were replicas. Now I don't know if I should go to some place in person with them and be disappointed still. It would have been nice to know how much they were worth, go ahead and get them authenticated, and just give it back to my client because it would have been very much conflict of interest true to value.
the fake one, the stars are thinner also, not as full.from working at a coin shop yrs ago, if someone comes in the shop with something like that 99% time its fake, no joke.but yes you have to check.