I would interpret these words differently. To me a room category, and especially suite versus nonsuite room, isn't just a specific feature such as a description of particular rooms within the same room category would be. Unless one reserves a run of house room (such as for a convention rate), I would consider the room category to be confirmed. Similarly some Starwood properties abroad let one choose categories that include the words smoking, nonsmoking or (neither specified) in the name of the room category, often at different rates. If I pick the nonsmoking room category even though it is more expensive, I would expect to get a nonsmoking room and hope that the property would view it as more than just a request that isn't guaranteed. This is different in my mind from picking the (often cheaper) smoking preference not specified category and adding then requesting a nonsmoking room..