IMO Prohm has been solid, but his building of a roster is behind Hoiberg. In some ways Hoiberg fortunate that most of his stud recruits stuck around 4 years- Morris, Long, Niang, Thomas. Whereas Prohms elite guys Wigginton, Horton-Tucker, Lard and Hallburton as a group will play 7 years at ISU.
Also Prohms teams seem to lack some of the edge/nastiness that Fred recruited- guys like Hogue and Kane.
Otherwise I think Prohm is in the mold of Johnny and Fred. Teams that win because they outscore vs. out defend the opponent. Floyd won because his teams would out defend opponent's. Larry was great because his teams could win by outscore or out defend opponent's. Plus they played with an edge.