Realised last week that I hadn't upgraded my VHS copy of Phillip Kaufman's classic 70s version of Invasion of the Body Santchers and went Play to have a look. I decided to go for the R1 version which seemed to have a few more extras including a Pod-people Retrospective eek: !!)and was only a couple of quid more expensive. When it arrived it was definitely the R1 version but only seemed to have the same number of extras as the R2, then I worked out what was going on... the retrospective and all other listed extras are actually in the liner notes. So I doubt very much whether there is any difference between the R1 and R2. Save yourself a couple of quid and go for the R2.