Cliff Notes version...
Wheeler is only 5'8" but super quick and skilled -- a scoring PG.
Nadolny is kind of a Naz or Nick type -- a long and strong combo guard.
Grill is a poor man's Matt Thomas. Size to play 2-3, mostly a SG.
Good summary.
Wheeler think a shorter but stronger Monte pure pass first PG.
Nadolny agree with the comps, I would say Tre Jackson and him have similar games but is 2 inches taller.
Prohm gets one Wheeler/Nadolny to fill his traditional scoring PG role ISU should be set at PG for a couple of years.
I like the Thomas comp Grill can shoot but not quite at Matt's level. I might comp him to Christoperson. Grill is more athletic than both at the same age. Caleb opened my eyes with a few of his dunks and I think he could be better defensively.
He would fill the need of a developmental shooter who could switch 2-3 and play pg in a pinch.