Well, personally, I don't think the animators meant for any of those lionesses to be Sarafina. At least not officially. As she wasn't needed for the rest of the film, they probably just passed her off as a random lioness, and let us interpret different lioness appearances in our own way. Technically it's all up to the fandom to decide where Sarafina was or what her fate was, as there's no right or wrong answer
