Power of Dana is good. But not better than Calveit. Calveit can play even a neutral card. Dana can only play ST card. Calveit doesn't have any invisible restriction to have a full NG deck, but Dana does. Unless you put all ST cards (and some junk cards too in it), she will be much weaker. Calveit doesn't have any restrictions.
So, NO. They both are different and have their own strengths. They are not stronger or weaker than one another.