We recently booked a last minute trip and the 4 mods were all different prices. FQ was the most by far ($200 a night), then POR ($160), then CBR ($140) and then CSR was the least ($130). We chose CSR. I'm guessing the difference was because the discounted rooms were already sold out at the PO resorts.
It used to be that you could get a really great discount at FQ even last minute, but that is no longer the case.