It really depends on the size of the clowns. Their stripes are usually pretty small and not even developed until pretty late in their postmetamorphasis. I for one, really can't tell with any certainty looking at baby maroons and predicting which ones will have gold bars and which ones won't. Also, there is a good bit of variation with the maroon clowns and I don't think you could always use stripe width to tell which ones are going to be goldbar.