I'm a huge Arizona basketball fan and probably overrate guys like Ayton, Markkanen, McConnell, etc. because of it, but Mobley is in another stratosphere than Ayton as a prospect with his perimeter skills. Ayton always showed a decent touch, but nowhere near the levels of finesse, quickness, and general offensive skill as Mobley.
With Ayton, any time he settles for jump shots, it feels like a wasted possession since he's at his best when he's close to the basket, staying aggressive, and embracing his "Dominayton" persona (which happens way too inconsistently).
Mobley can actually create on the perimeter. He's so agile and skilled for a 7-footer. It makes projecting him out as a big that can anchor your offense and play inside and out so much easier. Add in his defensive brilliance with elite-level rim protection and switchability, and to me, he's a no-brainer, no-questions-asked No. 1 pick.