I think this is the best series from the other series. And trust me, I saw all the episode of the other series. (Sabrina the teenage witch, Sabrina the animated series, and Sabrina secret life) It's more mature than the other series. However, it's not that mature. (Like the maturity of Wizard of Waverly Place. It's funny, but also have that maturity in the show) It's way different from the others. I love the series! I'm 15 and it's the maturity, and childlike cartoon I like.
Parents, not worry. If you have doubts, just watch the first episode.
Sabrina is a typical teen, with double responsibility, and double the school. She shows kids to put their responsibilities first, before there wants. And the message is to do what is right, and to be kind.
Some scene are not for all kids. Nothing bad, but some of the character design (werewolf) can be scary for little kids.
The first episode (dances with werewolves) is good!
Just watch the episode and you can see if this is for your child.
Every child is different. You know your child(ren) the best.
Your decision, but Sabrina: Serects of a Teenage Witch is a very good series!