I believe the difference was only a disk check with the Retail version. With the stream it was a limited install which is why I bought the disk. You can make a back up copy of the game and by the time you'd want to re-install it on a new computer (few years down the road) there will probably be a patch to remove DRM by Larian similar to what they did for Beyond.
Hopefully the stream version of the expansion has unlimited installs so I don't have to buy another disk version.
Last edited by LightningLockey; 17/07/10 06:01 AM.