6+1 on the fronts is very close to stock. If you want to run all 4 the same for rotation, you’ll need 1-1/2” spacers on the rear or it will be narrower. If you don’t want spacers, 4+3 on the rears will get you close.
Note that many mfrs are ‘carless’ with their x + x numbers. I know that STI HD9 wheels are Talon specific (or at least advertised that way) and are very close on my R. I can’t speak to System 3.