Mitch, here's a basic description:
Loop: Should be round, entry & exit altitudes should be the same
1/2 Cuban: First part should be round, stop on the 45° exactly, the roll will be a slow roll, should stay on the 45° before & after the roll, the line before & after the roll should be the same distance.
270° Turn: Roll into the turn on heading, turn can't start before the wings are at 60° or better, same thing on rollout, stop on heading, then roll out. No altitude gain or loss.
Roll: Technically a slow roll (that doesn't mean it has to be slow), rolling about the axis, no heading change or altitude change.
1947 Stinson 108-2