Both have pros and cons these days in my opinion. I'm a monorail geek, so staying at both have been goals of mine for years. We have been in Contemporary twice, both times tower, and loved it. Very quiet. They were just starting to refurb the rooms, so we had an older room, but found that nice. Service and staff were top notch, food choices are great. Loved being 1 minute walk from the monorail. Stayed at Poly last year. Had a newly renovated room and it was awesome. Service was fair, food choices are good. The grounds and pool are beautiful, we loved them. The biggest disadvantage we saw was that the layout means you may have a hefty walk to the monorail depending on the building. For us, we frequently walked to the TTC to hop one there. We had a major issue with the way management at the Poly handled a problem in the room, and to be honest that has soured us a bit on the resort. We just felt like the staff at the Contemporary was way above par, and we had a few issues there as well on one trip. Having rambled on about all that, it boils down to Poly being more appealing to the eye in our opinion, but Contemporary being more guest friendly. If monorails are a main consideration, we vote Contemporary Tower. Can't beat walking out of your room, and there it is below you! Hope this helps (although I just re-read it....and it probably won't :lookaroun )