We train Spitfire pilots via Chipmunk then Harvard (sometimes Piston Provost as it has pneumatic brakes) and then the real thing. I'm sure the Chippy will be a fine intro to the mini Spit especially as GtE's description of the handling makes it sound very similar. The lower inertia and (I guess) lower wing loading will make a difference but a good grounding on the Chippie is a very sound start.
3 Point