I haven't compared the Satisfaction Unlimited test press to the album version, but I've never noticed any differences between the two. I could check to see if the track length differs. Don't think I have any other unreleased stuff but will check. There's a Chairman 45 that was never released but if remember correctly both tracks were album tracks.
I picked up a Lucifer test press that was originally marked "Golden World", don't know if scans are of interest. I also have some documents that came with a few test presses I bought earlier this year.