In this iPhone 3G / iPhone 3G S graphics comparison, you’ll see “the same app (AirCoaster 3D) running the same roller coaster track (an extremely complex one with tons and tons of loops).” Video after the break.

It’s pretty obvious which one’s the iPhone 3G and which one’s the 3G S. Btw, AirCoaster runs well under normal usage on older iPhones and iPod touches too.

[via TouchArcade]