PS3 vs Xbox 360: Downloads and Updates
I bought LittleBigPlanet for the PS3 about a half hour ago. I'd be playing it, but it's updating. And it's about 55% done.
I don't know how the Xbox 360 does it, but it's not uncommon for games to get updated, and the updates are always just a few seconds. I'd speculate that the Xbox 360's OS has some built-in dynamic patching mechanism, where the PS3 has to replace entire files. Or something like that. But it's something that the Xbox clearly does better.
Another thing the Xbox 360 does better is background downloading. On the PS3, if I download a game or demo in the background, it seems like what it actually downloads is some sort of installer, that I then have to go and run in order to play the game. Of course I can't install it in the background, so I end up waiting while it installs.
On the Xbox 360, if I download something in the background, when the download is done, it's ready to use. No waiting.