i am in a similar situation. i was initially leaning toward GSPP but I have recently changed my mind. After doing the cost analysis, the difference is approx $25k for me, which isn't as much as I thought it would be to uproot my life to CA from the east coast. Another point is that the GSPP tuition is going to rise. At the open house, Martha said it would rise approximately 15% over last year but the numbers won't be made official until July. That is a pretty large increase especially if it rises another 15% the second year. I think most schools increase their tuition by 4-5% each year. That being said, it seems fairly easy to get a GSI position at GSPP in your second year which would cover most costs.
its a tough decision but good choices to have... !