According to these chaps;
, the NA Mustang won the war.
The Mosquito was, indeed, a brilliant aeroplane. One of its selling points, though, was its use of material and labour not engaged on other essential war work. It also needed shiploads of balsa wood to form the core of the plywood sandwich; all of which needed to run the U-Boat gauntlet from South America. To increase the Mosquito population would probably have meant training more skilled cabinet makers and taking the gamble to move wood at the expense of metal.