Different. But that's about 65 million years of different history, so it's frankly impossible to even begin to speculate. One thing, though, is certain -- if dinosaurs hadn't become extinct after the asteroid collision (up to their bird relatives, anyway), then it would certainly have happened some time later anyway, or they would at least have evolved in some way such that you would no longer recognise them as dinosaurs.
So, likely, the world would have been entirely different and we might not evne have been here to ask the question.