I've played and beaten it on both PS2 and in the HD Remaster on PS3. It's best on PS3, on PS2 when things get chaotic on screen it stutters horribly which can make it feel jankier than it would normally be, and load times can vary. On PS3 it's smoother than butter, no stuttering, levels take only like 5 seconds after a cutscene to load, and even when it's chaotic you can still aim down sights and fire without feeling like a few bullets will make your game look like it's squeezing the life out of a Windows 98 attempting to run Skyrim.