Mahomes would be better, but he's simply never been developed.
His footwork is utterly terrible, he trusts his arm without setting up his throws.
It's just unfortunate, because he's got great talent. Maybe he can learn ahead of the curve at the next level as a project for someone.
I like his arm mechanics more than Trubisky to be honest. There's something in Trubisky's release that makes me cringe...just seems to on top of ball and I think it's ugly.
Mahomes footwork sucks, mostly because he only throws out of shotgun. It'll be interesting to see how he develops when getting under center. Could be something he can clean up pretty easily.
The film I posted is probably a bad representation...in fact Mahomes throws pretty flat-footed a lot of time on quick timing routes. The video I posted was a lot of broken down plays showing his athleticism.