Having stayed at both my vote is for the Poly. I just wrote a post GF Aint what is used to be. and believe me its true. We only stay in the GF of the Poly. We just returned from our trip last night and stayed at the GF RPC Concierge Deluxe. Deluxe what, I still have not figured out - Let me tell you, they couldn't get anything right. We weren't looking for any freebies or upgrades....we were practically throwing money at them and they could not get it right. Stay at the Poly, you will be so happy you did!
Don't get me wrong the GF is beautiful, clean, well maintained and the mousekeeping is the best. That's where it ends, the service is not up to par.