Just to make sure since I am looking into to getting the leader Buster Optimus, the only thing that differs from the one packaged with Jetfire and the one by itself is the faceplate right? Also, the Jetfire that comes in the two-pack, what exactly are its differences from regular Jetfire? Also, they're voice gimmicks have to be different right, since they are Japanese only? So, what do they say? Any info is helpful and very much appreciated.