The Advance 40 is a full-span aileron plane?
Flaperons can be done with it, but..
Full-span flaperons can generate tip-stallls when the plane slows down.
Each airplane has its own way of flying, and you shouldn't expect too much similarly especially when the wing loadings will be different.
The flaps on the P-47 won't do create the tip-stall potential, but it too can be flown too slowly, which also results in a stall and crash.
If you split the ailerons on the Advance into seperate flaps and ailerons, you'd be ahead on the learning curve for the P-47.
The P-47 will still have different flight characteristics from the Advance in any event.