re: Spit XVI vs Mossie VI.
There are multiple other aircraft that, skill being equal, mean death to a Mossie. Perking the XVI would only slightly change that as most of them would go to the Spit VIII, which is only slightly less deadly to the Mossie.
Assuming the other player knows what they are doing, the following free aircraft mean a quick death for me, in rough order of difficulty, harderst at top:
La-7
Typhoon Mk Ib
F4U-1A
F4U-1D
F4U-1
Bf109K-4
Spitfire Mk XVI
Bf109G-14
Ki-84-Ia
Spitfire Mk VIII
La-5FN
Yak-9U
Bf109G-2
La7? I destroy or drive them off with a Jug more often than they destroy me. I'm no Mossie pilot, but from flying against Bat I was under the impression it was at least as nimble as the P-47. The Kurt and Yak are not actually superior to the Lala, although they are typically manned by better pilots. In any case, fighting them is nothing like what you run into when you have to force a knife-fight with the Spits...who may make horrendous mistakes angles-wise but still retain the turn rate to swap ends and come on with Hispanos blazing at your face.
It is interesting, but every single plane you ticked off here is inferior/inferior or similar/inferior to the SpitXVI and or SpitVIII*, according to the standard definition of that term. Only the late model 109s and perhaps the Ki seem to be similar (again, using the standard definition of that term) in energy performance at typical MA alts. Note here that the Spit series retains E amazingly well under Gs, which makes the E performance relative aircraft that do not retain E this well better in actual dogfights than the on-paper figures would lead one to believe. And of course, these late-model 109s are decidedly inferior in wing-loading/turn performance.
The F4Us you name arguably the most formidable of the lot vs. the Spit, the Hog can turn an extremely small radius, while being decidedly inferior in thrust/weight. But the caveat must be added that the sustained turn rate of the Spixteen is decidedly superior to that of the F4U, and the full-flaps radius is only a few feet larger. So even giving the F4U the nod for superior angles performance is debatable.
IMO, the F4U, 109 G-2, or Ki-84 are the best bets for taking on the Spit. The latter two are still seem to be double-inferior, albeit not terribly so. Obviously piloting decides a lot, and Spits are often horribly flown. Still, I think given equal pilots and an equal footing, the Spit can drive off or destroy all three of these contenders a majority of the time.
Karnak, I do not argue from a position of ignorance. I think I know the potential of these planes pretty well. I have tangled with them all, in the MA and in practice fights. If I am grossly in error regarding performance facts somewhere, please point me to to the appropriate data.
*Say what you will, the SpitVIII's glacial roll rate is a decided disadvantage stacked up against the SpitXVI's top-of-the-line roll under most MA conditions. The potential for insane and hard/impossible to follow guns defenses in particular are so much higher for the XVI than the VIII