Marseilles was not a man of large stature and was not doing well, health-wise in his later days but still managed to push his 109 to it's limits, which is impressive.
Had he been in a 190, with it's better performance and easier handling, he would have been, in my opinion, a terrifying adversary.
One of the better Fw190 Aces, was Gerhard Thyben, who was well known to push his Fw190 to it's limits in turning fights and his observation was that the Fw190's responsive controls and engine power allowed him the ability get the best of his opponents in a turning fight.