The use of rudder in turns can be quite different in a specific airplane if you convert the machine from wheels to floats.
I fly a Husky A1B which had control harmony much like the Pitts Special ( which was what prompted me to choose the Husky over the Super Cub ) until we installed Whipline amphibious floats.
Unless I use rudder during the entry and exit of a turn the ball will be way out of center and stay there.
Why would that be?