Honestly, this thread has become far too popular. This is like asking if Planescape: Torment was better than Final Fantasy VII. They are quite different. To throw my two cents in, though, if I had to make a recommendation right now, I'd have to give it to DA:O only because it's more stable at the moment, not because it's a better game. Were they of the same level of stability, it's almost purely a matter of preference, as both are shining examples of their respective subgenres.