Pop-In & Loading
With a huge, seamless streaming world, data must be constantly read from the disc. The PS3 version, with its required HDD install, loads missions a couple seconds faster and decreases pop-in. The Xbox 360 version can suffer from some very noticeable texture loading, as things like trees, vehicles and building signs will regularly pop-in as one tools about town. It can be distracting, especially during high speed chases, and the PS3 version isn't entirely immune from it, but it's not a game killing problem.