The goa mix never got an official release as the purpose of it was to be broadcast on Radio 1 and didn't need to bother with licensing issues. When Cream released it in their shop it wasn't fully legal like a typical commercial DJ mix cd is these days because there was no licensing involved for each record in the mix.
This new release from 2010 was the first time the goa mix got a fully legal and official commercial release. It isn't the original cut of the goa mix that Oakenfold did in 1994 though, the whole thing has been redone, but is still for the most part based around the structure of the original goa mix.
The mixing in between each of the records is fresh with new transitions, some of the pieces have been covered by the Perfecto Symphony Orchestra, and some of the original records weren't used while some new records have been included. The arrangement of the whole mix has been slightly rearranged as well.
Overall it's a fresh take on the goa mix, and if you've heard the original goa mix, I think you'll be pleasantly surprised with this new release of it!