Rebels is far stronger in every way than Clone Wars, I think.
And no more kiddie. It’s fun and lighthearted at times with a youthful spirit but that doesn’t necessarily make it kiddie. The fact that kids can enjoy it too is not a bad thing. Honestly Clone Wars with its endless firefights and lightsaber battles is more kiddie in my mind because that’s just ADD fireworks catnip for young children. Rebels more often is interested in character and story.