Grand Turismo...? I never liked car games, but come on. What's there to do in a GT game? Unlock what, more cars? This is an RPG. Leveling up, getting armor, items, weapons, continuing missions, etc.
You do not 'have' to buy the game twice. If its the same game, you can just buy one, either Wii or DS. But, if you get them both, you get the extra play time. It's an option and a really good one IMO.
I didn't know that this had been attempted already, excuse my "whoa" reaction
