I think both Smart and Bradley are legitimately top-5 guard defenders in the NBA today, but as others have mentioned, between Smart's missed time and the fact that "defensive reputation" is a large part of the deal, I think Bradley has a better shot at making first team than Smart. If the season ended today, there's no way that one of those two isn't one of the first team guards. It'd be a travesty if the second overall best defensive team isn't rewarded with a first team player, especially when they have just as strong, if not stronger, of a case as any guard defender in the league.
I'll say two, and I think it'll be Bradley first team and Smart second team. There's just so many other wing defenders, i.e. Kawhi, Green, Iggy, George, etc., that Crowder will just miss the cut, especially if we already have two other defenders on the two teams.