Zac Efron vs. Joe Jonas: Which Disney Dude Would You Rather?

It was a former Disney dude buff arm battle, as "High School Musical" hunk Zac Efron, 25, flashed his tan, ripped muscles before hurting his wrist while filming his new movie in L.A. this week (left) -- while musclebound "Camp Rock" boy bander Joe Jonas, 23, pumped up his God-fearing biceps in a funny new video clip (right).

They've both grown up to be fine young men, so we gotta ask ...