Newgy made some mods to the 2050 (around 2017 from memory) to make it more compatible with the 40+ balls. Their test confirmed though that most of the older 2050 worked fine with the 40+ balls. There is a setting you can adjust (Calib adj) that can help push the ball through a little harder if required.
The 2055 robot body is pretty much the same as the (newer) 2050 (mainly updates to the controller), so an upgrade may not help in this regard.