This is what they had to say about the difference between the PS3 and 360. They did shed some new light on one difference, there are times where the 360 has a load time, and the PS3 has none. This is new information.
If you're wondering about differences between the PlayStation 3 and Xbox 360 versions of Grand Theft Auto IV, the truth is that there aren't many. The PS3 version can only be played after a mandatory install that takes around 10 minutes, and its load times are a little shorter and less frequent as a result. The visuals, which don't always hold up to close scrutiny but are impressive during typical gameplay, are comparable and feature the same quirks (shadows that flicker, for example) on both consoles.







