Hi according to Play com it says the Mexican has a DIRECTORS COMMENTARY,DELETED SCENES, AND TRAILERS, but on my copy there are no such extra's, have I got a dodgy copy??
If it's the UK version check the product code on the back, if it's this one it's a rental version 6882079 if it's this one 6882352 it's the normal UK version. Most but not all rental disks have no additional features.