Was the F4U Corsair better than the P-51?
The F4U could outfly and outfight a P-51 in almost every area except range. In 1944 the US Navy actually tested a P-51B razorback against a Corsair and a Bf 109 and Fw 190: the Corsair beat all three, although the Fw 190 did very well. The Navy actually evaluated the F4U-4 vs the Bf 109G-4, Fw 190A-6 and P-51B Mustang in simulated combat and the Corsair clearly came (mostly) out on top in all contests, in terms of sheer combat. The Fw 190 did well, too.