DW and I have stayed at the GF 8 times over the years. Our grandson was 3 years old during our first trip and the GF worked out very well for our group. If you get the right room, you can sit on your balcony and watch the EWP at night and also have a good view of the MK. As mentioned before, the GF has hot tubs and the Poly doesn't. The GF has sinks outside of the bathtub/shower and toilet area, while the Poly has all in the same room. The GF has two pools and I believe a kiddie pool. We stayed at the Poly once, so I can speak from experience of both resorts.
We are just common people from a small midwestern city and we didn't find the GF stuffy at all.
Enjoy your stay at whichever resort you pick.