I don't see how GT4 can be considered a driving simulator, IMO. It's a good racing game in its own right, but I still don't see why people think it's a simulator. I mean, some of the cars handle like they're from the Need for Speed series. You could easily take turns by RAMMING into any guard rail, and not to mention you could just ram into other cars with little to no penalties. Oh, and what's the point of the stop-and-go driving tests?
Yeah, just go Need for Speed: Carbon. Autosculpt feature, right?