To my knowledge, the album claims that it is a different mix, done by Abrams. But I think it's been confirmed by the band that they are the exact same on both albums.
You can clearly hear differences between the two, well I know I can. The Hulk version is more classic GN'R sounding, whereas the one on Contraband is not so much, and yeah, there's some added vocals towards the end of the song too.
Matt also does a kick/snare drum thing at the end of the song on the Hulk version that's not on Contraband either.