Yeah there were elements to distinguish it from the Disneyland Hotel, but within the context of the Disney community, the theme was basically the same as the Disneyland Hotel: 20th Century Hotel. I think I understand where they were going with it. Since it was being subsidized as a luxury hotel, they didn't want to give it one of those "cute" Disney makeovers like the resorts in Florida. It was going to have to compete with real hotels.
So compared to the Florida hotels, and other Disney properties, that they all looked so modern and contemporary, like other hotels, means they all looked the same.