Star level has a very high correlation with skill level. That doesn't always transfer to production, because for the most part in basketball, top 10 recruits are gone after one year. A lot of top 20s are gone too. The issue isn't that they're top 10 recruits that were over rated, it's that they're freshmen that are trying to acclimate to the college game.
If you have former 5 stars on your team that are juniors/seniors (rare these days) they're almost certainly going to be better than the junior/senior 4 and 3 stars.
If you have former 5 stars on your team that are juniors/seniors (rare these days) they're almost certainly going to be better than the junior/senior 4 and 3 stars.