By how much? How much of it is due to the 20mm ammo? I rarely ride the horde, so I'd take this chog for free pretty much everytime. I'm used to short range cannons, and the amount of ammo is pretty much enough on its own to decide it for me. You can do way more killing, no matter how much easier or harder per kill, with that much ammo VS the amount of 50 cal.
Then you have the rest of the picture... The F4U is rugged, can turn with almost anything, has excellent control authority, dives well.... I think players would acclimatize to it enough, while following the 4x20mm carrot, to put the Chog usage near or at the rest of the F4Us.