Not all deluxe savannah views sleep 5, ours was a King and the sofa could have slept 1 more for a total of 3.
The deluxe rooms are on the 5th floor and are larger than the rooms on the floors below. The 5th floor also has concierge rooms. I believe the only difference between the '5th floor deluxe' and 5th floor concierge' is that the concierge room key will allow the elevator to go up to the 6th floor (and concierge rooms have bathrobes in them). Our concierge room looked just like the pictures I'd seen of deluxe rooms.
We really liked the view better from the 5th floor as we could see animals all over the savannah. When we went down to the public viewing areas on the 2nd floor we could only see the animals right in front of us.
Some have commented about how dark their AKL rooms seemed. We found our room while not brightly lit, it had nice 'mood' lighting. Now since the deluxe rooms are larger, they hang out over the balconies of the rooms below. This may cut down on the outside lighting in those rooms.