We don't know if there's much of a difference between an AI and a brain. If we look "into" an artificial neural net we only see a lot of "weights" that don't make any sense. If we look into a brain, we also can't make any more sense of it. The difference is smaller than we want it to be because it seems to either give AIs a lot of credit or it makes us less than we want to be. We are very biased, don't forget that.