Ok, let me ask this from any plane info expert. I would assume that the P47M will turn virtually the same as a P47D-25 or 47D-40. Correct?
Assuming you are asking about the aircraft performance in the game, the P47 series of fighters can be compared as shown below.
In this first diagram you can see how the instantaneous turns compare. The P-47D-40 being the best, with the P-47D-11 a very close second. The worst, in terms of instantaneous turn radius and turn rate can be seen to be the P-47D-25, with the P-47N only slightly better.
In the next diagram you can see how the sustained turns compare and best performer is the P-47M, which can also be seen from the previous diagram to compare well in terms of its instantaneous turns.
The configuration used for these diagrams is 25% fuel, no flaps and the 8 x 50s with 425rpg, and the situation will vary as those loadings vary.
However, in that configuration the overall, the best choice for a turning engagement is the P-47M, and the worst is the P-47D-25.
Hope that helps...
Badboy