Cloning is the correct for seeing one installation on several machines provided you have a volume license. Businesses do that regular with hundreds with one master disk.
Simply moving a drive into a new machine with a different set of hardwares will obviously have the same negative effect regardless of which version since the installation and drivers installed are still tied to the first machine.
When simply going to change the brand of memory here on a new build MS got a call! That's with the 64bit 7.