This differs from the non-promo version in that the superior Francois Kevorkian dub takes up an entire side with its 11 minutes. The standard issue has the vocal on one side, and relegates the dub to the flip, squeezing it on with the album version. As we all know that narrow grooves are bad for DJ's, the promo version is superior because the dub gets a much cleaner, more open vinyl cut. And again, the dub is just a massive chugger that builds for quite a while before it really releases its energy, and beats the vocal version hands down any day. If you buy just one copy of this record this year, make it the promo.