I think very few historians would consider the SpitIX or the Fw 190 A5 early war planes.
In fact the FW (A3) heralded the turning point of of early eto to mid period.
Rhubarbs were begining to take place over Northern France and the local air combat was beginning to turn from defensive to offensive............. (for the RAF)
Clasically between the fighters from Tangmere and the Abbeville bunch.
It was Spit V's coming across the new FW A3's that sparked the rushed development of the Spit IX.
Looking forward toi trying it all out anyway