Hristo,
from what I understand FM's will be modified again and again. I do not expect that C.205 climb performance, despite correct, will remain the same all the time. I saw 109G climb rate ranging form 2,900 to 4,000ft/min from 0.40 to 0.44.
We will see a lot of changes in the next weeks. I'm sure. The G10 cant fight this way.
The Macchi is a 1943 fighters, a low performer compared to other AH kites, but still should be a very good climber, better than the Pony, the Fw190A8, the Hog and the N1K2. After 1943 speed, range and firepower were the critical factors in fighters performance, tho.
A 109F4 can easily outclimb and out turn a Pony but if the Pony pilot has good SA, the 109 pilot is a dead man.