IIRC, quite a few P-51 pilots liked the B/C models far better than the D model.
TY AKAK, now that you mention it I think I've heard that before.
Since my dad has always been a fan of the D, it was the one I chose to try to become proficient in. After spending time in the B however, I too feel that the B is better as a fighter.*
* repeat disclaimer: This is my impression after spending one evening flying the B, I do not by any means claim expertise in the matter.
I'd be interested to know what other people in the game think.