I have had an Impreza. Great car but just didn't feel like it would be up to much on a track unless I spent a fortune on handling mods. Bigger turbos, bigger brakes etc etc. The Z from standard feels like to was designed for the track. The way it handles and sits. The Impreza feels like a bit of a compromise for the road unless it was a special edition one. P1, WR1 or RB320? Which model are you looking at?