Davis and Noel are similar in composure... but I'd value MKG over any of the freshmen at this point, no question. Sure, he's a better player than any of these guys, but Poythress, the guy who should have the second highest ceiling IMO, is super inconsistent.
You're right that the age helps. This team doesn't and won't have that... and since I'd still value Goodwin, Poythress, and WCS as first round picks, next year might not really get it either (though Harrow staying would help).