Ok I will bite, I tried to find documentation on the Brewster last year to end this argument, of all the books and documents I could scrounge up, I could only find information on the F2A not the B-239. Biggest thing is the Finnish and Dutch do not have any information on it, let alone the US. As for the Finnish, their tactics of to engage when they want too and disengage was an advantage that makes the B-239 look godly with its kill ratio (kills well into 1944). Topic of "airframes" comes up, yes the B-239 shot down some La-5s even, again the tactics didn't change for the Finnish and Russians didn't learn.
I searched up and down and couldn't find the data, I have no opinion on the B-239 because I would assume HTC has data I can't find to support otherwise. I contacted quite a few places even put some money up buying documents in hope to end this futile argument, in the end I have nothing to show for it.
If you want to make a difference instead of whining, buy books like I did, and show the data you have, and let others compare and give opinions, if you are right - HTC would probably change it, however he put his money up and got the data, I see nothing here saying otherwise, nor films or any technical information.
Its mostly hearsay.