Note that "heavy" versus "medium" is more a question of tactical roles than weight; the Panther, for example, was a "medium" tank that outweighed most Allied "heavy" tanks.
Note that "heavy" versus "medium" is more a question of tactical roles than weight; the Pz.Kpfw. V Panther, for example, was a "medium" tank that outweighed most Allied "heavy" tanks.