Does DotP have all the cards which are in M14? (Except for the Planeswalkers...)
Or does one or the other have cards which are not in the other set ?
There are quite a few cards from older sets, and actually very few cards from m14 from the set. A few off the top my head are some new slivers in a bant deck, quite a few of the new rares, and the "staff" artifacts ({staff of the death magus})