I got a bit curious seeing that we're on about the Spit-vs-FW190. decided to have a look at the specs on wiki (if you can trust such a source - no smoke without a fire)
2 specs I find interesting are loaded weight and max takeoff weight. In both case on wiki, the Spits (Vb and XIV) loaded weight is only around 250Kgs below max takeoff weight. whereas the FW (A8 and D9) is a whopping 500Kgs. This is for a heavier aircraft with a weaker engine ??
This make me think that the Spit when loaded is simply flying closer to it's limit of staying in the air, than the FW even with it's higher wing loading. Which might encourage Spit pilots not to get happy about tight dogfights and rather use hit and run, which seemed to be the norm in the latter part of the war.
Something to think about
