My experience with the 109G-2 and C.205 tells me that the C.205 is doomed in a Co-E, Co-alt fight with equal pilots.... Assume no one makes a major gaff. Speeds will deteriorate until flaps come out. Then, the 205 is completely outclassed.
Same problem plagues the Ki-61. Good until slow, then a wallowing whale....
The few fights I had in the DA and flying the 205 for a few tours and this tells me the same thing I hated most about it, once you get the 205 slow its pretty much doomed, there is no perfect move to get someone off your 6, if they dumped E the 205 is simply dead.
However flown correctly, and climbing to around 15k it handles quite well with a pretty nice top speed, however getting locked up in a turn fight is a big no no, it simply doesn't "Excell" in any one area to be a late war fighter (which its not).