For starters, the Fw 190 FM has been tweaked to give more realistic elevator effectivity vs airspeed. At least some of the 190 FMs currently available loose all elevator control by about 650 km/h, whereas 190s were known to execute dive bombing attacks at speeds above 1,000 km/h and be able to pull out. So this is reflected in the new FM, which makes it much more competitive, especially at higher speeds. The Spitfires can, and should, still turn inside the 190, but in all other respects, the 190 is superior, at least against the Mk.Vs I was facing on this flight.
The problem is that CFS3 AI tactics are still biased towards the turn fighter, so effectively, as far as the AI is concerned, whichever is the better turn fighter will win. In this case, that is of course the Spit. So in the mission, I biased the AI skill levels against the Spitfires to compensate. And argueably that is as it should be anyways, at least during 1941 and 1942. There is a mixture of all skill levels in the opposing forces, but there are overall more rookies flying Spits and more aces flying 190s. Larger scale battles tend to make any disparity between aircraft a little less noticeable as well. The result is usually a fairly intense and unpredictable battle.