The tower rooms are newer with what I would define as a more swanky look and bathroom space. They are fully indoors in case it rains and you need to leave the room. They are housed in the "main" building where the lobby, a cafe, quick service restaurant, Rix Sports Bar, the gym, etc. etc. are located.
A non-tower preferred room would be in one of the motel-style standalone buildings closer to the tower than other rooms. The interiors are also very well done and have a deluxe feel even though it's a moderate hotel and they are cheaper than the tower rooms.