I agree with Nunzia. While the PP is a nice hotel, it is not quite the destination that the GC is. The PP is a hotel that Disney bought and converted to a resort while the GC is a custon built resort similar to those at WDW. Also, PP is farther from the parks and staying there will cost you more points plus a $95 fee to use those points in the Disney collection. Those points would then be Reservation Points and if you had to cancel for any reason they would not be usable at a
DVC resort.
As I said, PP is a fine resort and I wouldn't hesitate to stay there...just not when the GC is an option. If I had to split a stay I would do PP first and then move to the GC but it sounds like the OP has enough points for a full stay at the GC so that would be my first choice.