Depends on the night, but I think I know what you mean by pretentious, it'll certainly be less like that at Cream. The crowd there are very much "up for it", but then you never know on the night.
As for Paradise or Cream, it's looking like a particularly strong night for Paradise tonight, and a slightly weaker one fro Cream (Alesso headlining the Terrace and at best two members of Above and Beyond in the Main Room). I'd lean towards the former then as you'll more likely be experiencing the night closer to its best. But hey, that's just my opinion, keen to hear others views.