When booking my stay I asked the gentleman I spoke to at CRO this same thing. He said the only difference between the regular Savanna room and a deluxe Savanna room is room size -- the regular room is 266 sq. feet and the deluxe room is 381 sq. feet. He said that it has nothing to do with the view (deluxe being a better view than a regular), which was my question.
I don't know if there are any other differences, but he told me he looked up the details of the rooms on his computer and this is what he found.
Hope this helps!