Yes, you can use the pools/restaurants at either since they are sister resorts. The serpent slide is great! My son is acutally bummed that we will be staying at OKW in January (even though they will have a new slide open when we go) because he won't get to go on the "dragon" slide at POFQ. He remembers it from when he was 4 (he is 8 now). I think your kid's are the perfect ages for that slide, and good luck trying to pull them away from it!!
The curtains are in all rooms I think, and just divide the bathroom area from where the beds are. I have seen lots of pics, but I have not stayed there since it was redone. Both are great resorts and it is so hard to choose!! The only other thing that is nice about POFQ, is that if the bus fills up, it does not stop at POR where as if you are at POR, sometimes the bus is almost full when it gets there (or the POFQ get all the seats!). Let me know if you have any other questions!!