If you're looking for the 12-inches... From the New Order Discography
"In a simplified way, the green sleeve is the original version, and the cream/blue sleeve is the re-recorded one. However, one needs to look at the groove notation to be certain.
The green sleeve comes in two flavors:
\* G1: Original recording, groove notation: "Watching..", matrix# FAC33A1
\* G2: Re-recorded, groove notation: "This..", matrix# FAC33A1 (possibly)
The reason for G2 was that there were too many green sleeves left over once they re-recorded the version (recycling is good). I'm pretty sure that G2 contains is the FAC33A1 and not the FAC33A2 - though some may exists.
The cream/blue sleeve comes in three flavors:
\* CB1: Re-recorded, groove notation: "This..", matrix# FAC33A1, the track fills the side
\* CB2: Original recording, groove notation: "Watching..", matrix# FAC33A1
\* CB3: Re-recorded, groove notation: "This..", matrix# FAC33A2, the track is smaller
Why CB1 was withdrawn and replaced with CB2 beats me. So, the trick is really to check the groove notation to see what version you have."
/TLV