FWIW, I find the Dora the steadier gun platform of the two planes. 190s across the board seem to be very steady and lack nose bounce, even when you are "abusing" the control inputs trying to make a last minute adjustment for a snap shot.
But yeah, the forward views on the 190s do suck, a little bit more than they need to IMHO.
OTOH, I think Steve low-rates the Pony just abit. Sure, the Corsairs float like a butterfly, but there are plenty of situations where the F4U won't quite have the get-up-and-go to drag your butt out of an ugly multi-bandit situation, and the Mustang will.