Not sure if it makes a difference to you or not, but WL rooms are priced lower than the Poly - rooms at WL are smaller but still large enough. Also, the WL is smaller and self-contained. (The hotel rooms are all in one building with interior corridors.) The Poly has separate longhouses - meaning an outside walk to get from your room to the main building. (Fine if weather is nice ... maybe not so much during a really humid or rainy day.) The theming at both is beautiful! As for transportation, the Poly does have the monorail, but the ferry to/from the WL-MK is a really nice treat. The Poly has the better pool - although the one at WL is fine too. I've stayed at the WL (and would again). I've visited the Poly and would love to someday stay there too. For the extra cost of the Poly though, that would be a trip were I wasn't going to spend as much time at the parks in order to really enjoy the hotel! HTH - I'm sure you'll have a fantastic time no matter which resort you choose.