Wild Savannah is officially a Twist Gaming title powered by Carrot Gaming. So in a sense, it could be categorized as either, though Stake displays it onsite as a Twist Gaming slot machine.
To clarify, Carrot Gaming is essentially an umbrella for Twist Gaming, Massive Studios, and Titan Gaming creations. And Carrot Gaming itself is owned by Easygo, which is also the holding company for Stake and the Kick platform – if you want to better understand the relationship, and why you’ll often see these names together.