While the numbers may vary a little, the size difference is not significant. What is significant is that the studios are more shaped like OKW (though smaller) and the Inn rooms more like BWV, BCV, SSR. There are also other difference that can be significant. The Inn rooms have 2 queens while the studios have a queen and pull out full. The Inn rooms also have no control over view where the Inn rooms do. I'd say if view is important or if 2 beds is better, the Inn rooms are the better choice. For those that only need 1 bed, the studios can be a good option.