Very different games. I have played DAO and DA2 but I like this game a lot better. In both games, you can become very overpowered but the boss fights in t his game and the relative open world are why I like this more.
Both :) DAO is very good. I have also played many of the different beginnings. DD is also very good, though if you have not bought it yet, I would wait until Dark Arisen (2nd half of April). If that's the case, you can play DAO now, and DD:DA when it comes out.
GT: Rob ShadowHawk and DragonHunter720 "Life? Don't talk to me about life!"