it depends mainly on how well the pilots know their respective planes, and how well they push their planes.
this sums it up completely............. for all the matchups........
1st one to foul up and make a mistake......is the 1st one back in the tower, most times.....
also Co-E does not determine same alt and same speed.........unless it is specifically pointed out that both opponents are at the same alt and speed like if the 2 were in a Duel! , which is not the case in this discussion....
example: P51D is at 10K alt and doing 225 IAS vs F4U-1A which is at 8K alt and doing 340 IAS = Co-E ( the numbers for speed and alt is just for illustration purposes only )
F4U vs P38: the win could go either way, a difficult proposition, pilot skill a determining factor.
F4U vs P40? the win could go either way, a difficult proposition, pilot skill a determining factor.
F4U vs spit9 or spit16? the win could go either way, a difficult proposition, pilot skill a determining factor.
F4U vs BF109s? the win could go either way, a difficult proposition, pilot skill a determining factor.
F4U vs FW 190D? the win could go either way, a difficult proposition, pilot skill a determining factor.
F4U vs Ki84 the win could go either way, a difficult proposition, pilot skill a determining factor.
F4U vs P51 the win could go either way, a difficult proposition, pilot skill a determining factor.