Short trooper from the two pack has the same armor as the tall trooper and Han. As others have said, though, the Luke figure has the shorter chest piece.Has there been anyone who separated the armour from that 2 pack to show how different they are? I thought they just used the han armour on a shorter torso body?
I would guess it would still work just with potentially no overlap on the lower chest piece. The undersuit is elastic and could probably handle the switch.
All this talk makes me want to make a short Sandtrooper.