I think Simba and Kimba are both great, they might be slightly similar, but the movie Jungle Emperor Leo, about Kimba, is about a white lion who helps out the animals in the forest and helps out a human kid too.
TLK is about a young lion prince who is growing up to become king, no humans included.
That last thing is what makes TLK way more interesting for me. The lions are persons, not animals. I think if Simba saw a human, he'd eat it
