The P51 PTS would not be as good as most straight wing low wingers. It has a tapered wing and they naturally stall from the tips. Straight wings naturally stall from the root. It's why trainers (that deserve the name) do not have tapered wings. That P51 is a decent P51 model with all the "training aides" removed, but it's not as good a flyer as any of the straight wings mentioned so far. Why? Because when a tapered wing stalls (as sometimes happens to beginners learning to land) the plane rolls when it stalls and the loss in altitude is often appreciably quicker than when a straight wing stalls. Both sides of the tapered wing are equally apt to stall, but one will beat the other in almost every case. And when that happens the model also yaws. Forces at the tips (and loss of force at the tips) have more leverage than forces at the center of the wing. So you get more effect, more changes of direction, and it's quicker with a tapered wing. And that P51 has a tapered wing.