does anyone know if there are any differences from the general north american releases compared to the japanese beast wars returns reissues? i have looked at many pictures on the internet and cant see a difference at all. can anyone shed some light on this? while we are on this....are there any differences with cheetor (mega size), rattrap (mega size), megatron (mega size), nightscream, beast changer, jetstorm (ultra). the rest from beast wars returns are pretty obvious redecos.