Some of the animals vary in each Savannah. When we stayed at AKL we requested the Arusha Savannah, which is the only one with zebras. Here's a list I found online of what animals are located in each Savanah.
Sunset Savannah: Male Giraffe, Bongo, Impala, Thompsons Gazelles, Ostrich, Ankole Cattle, Waterbuck, African crown cranes, stork and blue cranes.
Arusha Savannah: Pelicans, geese, giraffe, ankole cattle, zebra, Wildebeast, eland, gemsbok
Uzima Savannah: Giraffe, Impala, Kudu, Bongo, Blesbok, Thompsons Gazelles