The R1 version of this disc was originally released by MGM along with a little trivia booklet. It was then later re-released by Warner Home Video. It would appear that the re-release is simply the MGM disc repackaged as it still has the MGM logo on it. The booklet was not included in the re-release.
From available material it would appear that the R1 and R4 releases are identical as far as content is concerned. The MGM release included a small booklet on the film.