Ultimately it may come down to what the other team wants, for the player DA wants. If you are going to trade either, then both are available. One is not dramatically better than the other.
That said, there is some risk that we are presuming that a taller big would naturally be better than BBD/Powe. As DA noted when POB was brought on board, he may be about as long as you get, and we seem to need length, but he still may have a difficult time getting time from BBD/Powe. Be careful what you wish for, you might wish you had appreciated more, what you had.