You give way too much credit to what flaps do. If a pony needs to deploy to the 3rd or more flap position it better get the kill shot in the next 3 seconds or die 3 seconds after that - especially against a K4.
I agree with this, one notch of flaps for a few seconds and if the Pony doesnt raise them he is burning off to much energy to deal with a K4. I use the flaps strictly to get a Lag shot behind and zoom away instantly, same goes for a P47 if I am under 15k.
C205 doesn't out turn a Pony in a flat turn, Nor does either play with a K4 - but three different planes, its Apples to oranges. The K4 doesn't get sluggish when it gets slow, the C205 becomes a Barn when it slows down, the C202 however is extremely nimble when its slow.