If it comes down to a Smith vs Cain option, I think Cain's skillset fits team needs better with the other pieces already projected to be on the roster. I think both can be good rotational players for Coach Beilein's system, but with Irvin's eligibility expiring after this season and Robinson's expiring after '17-18, I see a potential hole in outside shooting from the wing position. Matthews is more slasher/finsh around the rim than outside threat. The likely options for UM at the "4" in this recruiting cycle aren't dead-eye distance shooters. Teske & Davis are more "inside the paint" scorers than stretch-post options.
Smith's scouting report reads more like Matthews than Irvin.
Again, I think either would be a fine rotational player in our system; just trying to project team skillset strenghts/weaknesses.