Depends from which perspective - Pacha or Cocoon's? VIP is the venue's money-maker (as is the restaurant in Pacha's case). Generally speaking, if you're a promoter you want people buying general admission tickets not VIP. That's where you're judged, and that's where you typically make the most money. Of course it depends on the clauses of the contract - who takes the door/what is the door split, does the promoter get any % of bar sales, who pays for artists etc. Essentially, there are a lot of variables - moreso in a venue as multi-faceted as Pacha (they have complimentary admission for hotel guests too, don't forget). These are details I can only speculate on.
Of course, it will vary from party to party. Solomun will likely have a very lucrative VIP deal since a) VIP is banged out every Sunday and b) you regularly can't squeeze anybody else through the door for GA. He is likely an exception to the rule, though.