I think the answer would be found in how much you want to spend and do you care where you stay.
I
GCH. I would stay there every trip if I can. This past trip we used DVC points and stayed at GCH-Concierge. Absolutely loved it! Of course, I'm spoiled. I
all concierge levels!
If your heart is not set on the GCH, it sounds like the PP offer is such a better deal. We never buy breakfast when we stay on any concierge level. At DL we found we rarely bought drinks/snacks. Everything's so close so it was easy to pop in and grab a soda/snack at GCH. I know PP is a little more of a walk, but I think it still could save you extra $$$ with drinks/snacks.
And of course, if you want to try both places you could split your stay.