Canis lupus
Member
It's like I download a .zip file off PS3 and on XBL I download an already unzipped file.
Same reason applications on a Mac run from a single location but Windows applications spread themselves around the OS. Bizarrely the 360 is more like a Mac than a Windows PC in this respect.
The technical reason is that the 360 can execute disc images (e.g. like an ISO) and that's effectively what you download. A PS3 download is more like a zip or tar and all the many files inside need to be extracted and saved in the correct location.
This is also the reason why 360 disc installs are faster. When you install a DVD on 360 it is just saving an image of the whole disc. On PS3 the OS has to find each file on the BD then copy it to the right place in the OS.
I do hope the PS4 downloads are like this, or background installs. Installing AC3(PSN) took 30-40 minutes.