Maybe it would work, but what would be the point of that?
It's usually better to use the recovery media that came with the computer itself: and in the case of Dell or HP it's usually a good idea to do a clean Windows install anyways (that is, if you aren't looking at a business notebook that is) to get rid of the pre-installed stuff.
Also, yes, there's quite a difference. If you're using Rescue and Recovery it's basically installing the Lenovo image of Windows 7 and all the original utilities and drivers onto whatever drive is in the ThinkPad at the time.
R&R is NOT a backup- that's why you use the Lenovo backup manager, Windows Backup, or the Seagate utility.
I've been informed that someone with an X series tried to run their R & R on their new Tpad and it failed.
I now get the logistics of the whole deal...a recovery disc would not work on other systems because they have different drivers...duh.
Ok, cheers again.