>>6097485They should be fine for stand-ins as regular Troopers.
Han is on the normal Trooper body, except he has a different, more accurate neckpiece, which Luke also has.
Luke's a little short for a Stormtrooper, as he should be. He has a different torso sculpt that makes him shorter than Han or the regular Stormtrooper figures. His belt is also a different sculpt, featuring a removable comlink and a sculpted in grappling hook.
And the figures don't have an alternate Stormtrooper head, they're actually just helmets that go over their heads, which makes them slightly too big but not terrible.