In some ways "all of the above" might be an answer.
Flat track racing mainly focuses on the higher end GT-12 & Eurosport 1/32 & 1/24 "scale" (or non-wing or USRA Div II) type racing which is more popular on flat tracks.
Wing cars (USRA Div I) cars generally run on higher speed banked tracks. A lot of the lower to middle speed Flexi type cars are run on both flat and banked tracks.
While in some cases there are different crowds who prefer one or the other, often they cross over and race either or both. Different strokes for different folks - but it is really dictated more by the track that is raced on then by the people, in most cases.
I had several requests a few years ago to make the separate sub-forum for "flat track racing", but the distinction has been a bit of a grey area for others as well as you, perhaps, and it has never really taken off. I'm guessing you are not alone in trying to figure out which forum is which and what the difference is.
Paul K @ OWH
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