I don't know much about SOG, but I can tell you about the poly. If you have little kids, you will probably spend a lot of time at MK. If so, it's nice to be on the monorail. Also, the pool at the Poly is fantastic. It is 3 sided, so you can walk into it like walking into the ocean (except without waves). Little kids can stand in it for about the first third of the pool without going under. It also has a great Volcano water slide. You can watch Wishes from the beach, and have monorail access to other resorts with great restaurants.
So why am I staying at WL this time? Hmm.... Anyway, I love the poly!