Unless someone can point out otherwise it looks like the first 3 categories of room are in fact identical in layout the only difference is the floor and the aspect. The Wonderful room is I think lower floor, the Spectacular room higher floor with better aspect and the Fabulous room which has more windows it would appear. Otherwise the room descriptions appear the same as do sizes. So it is possible that I did get an upgrade from Wonderful to Spectacular. I am not sure many would notice the difference

Cool corner rooms are where the room descriptions and sizes seem to differ. The Cool Corner Room seems to have up to 33% more space. The floorplan in the photos I linked shows how many corner rooms were on my floor. My guess is 2 with 2 studio suites/suites.