I found an Eno/Byrne bootleg entitled with "Bush of Ghosts demos" the other day. When listening to parts of it for the first time, I was somehow disappointed because the demo versions didn't strongly differ from those included on the final album and it even appeared to possibly be a fake, with an interview piece added to the beginning and some hissing effects laid over the record. It came out though (after comparing the version of "Regiment" available on the album and the one on the bootleg) that the recording apparently consists of actual demo versions, some tracks even having been newly added. Searching Google didn't give too many results; "Bush of Ghosts demos" may be identical with "Ghosts", which bootleg is mentioned on Talking-Heads.net.
What I uploaded for you is the demo version of "Regiment". The bass is tuned stronger than on the album version (which, on the other hand, could be a result of the shitty quality), which makes it work slightly more aggressive. So yes, it does differ from the album version. Slightly, slightly. If you need any more proof for it before you start downloading, hell, it's in an other key.