No that was it being modded the Blobeye thats stock still pulls well but can feel it's slower from when you have been in the bugeye. And I would say it will be the same for the Legacies if it's in the right range its power all the way through the gears. But if you was doing drags more mods would make it even quicker with the likes of antilag and so on, but know you're not after that type of thing from what you have said.
So I'm guessing you are either into dogging or need to transport murder victims or drug smuggling with not wanting police attention and big boot space ;) But joking a side I think once you have test driven either one, and once you have decided which is the right one you would be very happy with it they drive like nothing else I've driven. It's just making sure you get a good egg really with them. :)
Cost wise if you can keep off the money pedal and not keep boosting it everywhere you can get good mpg but just be warned it's hard not too ;)