In a turn, the outer wingtip is following a larger arc than the inner wingtip, and thus is traveling faster. This creates more lift on the outboard wing and less on the inboard - this is without considering the effect of ailerons. So there is an aerodynamic force wanting to roll the aircraft towards the center of the turn, however, there may be other designed features which will affect this tendency - dihedral, washout, roll stability, airfoils, center of gravity, etc etc etc.

I haven't flown either of the aircraft you mention, however I have flown other long span aircraft, and so far, the Cub is the only one I have found with this tendency.......