Steele, Marseilles dropped speed and flaps for bat turning inside faster aircraft and shooting them at very close range.
Rall considered Marseille the best shot of WW2, while the German Fliegergemeinshaft consider Rall as the best one of the Luftwaffe, since he did hard deflection shots at very high speeds, and sometimes at quite some range.
My source, - Rall, eye to eye while sharing a meal of salmon bread, and then Willy Göbel (Ret. Col.) of the German Fliegergemeinschaft while looking through his book archive.
Life is sometimes wonderful

Anyway, if anyone has more on Marseille, I am always curious.