The USB programming cable is the same for Smart Pie 5, Magic Pie 5 and Magic Pie Edge controllers.
Although the BAC-601 Smart LCD Display unit does have a setting for wheel size
(and a choice between metric and imperial output) it cannot be used to reprogram any of the controller's parameters.
If you use pedal assist, it is very useful to have the dedicated mode button to quickly change the level of assistance, and the screen is much easier to see in bright sunlight than a phone display.
The biggest problem I have with the Smart LCD is that it does not save any trip data when it is powered off
(but it does save the odometer reading).
Alan