I think all cases in which an adult male takes a young girl (or boy) he already knows, has spent a lot of time with and has been obsessed with for awhile is comparable to this.
Some of them are men who steal kids they're related to. Some are teachers or sports instructors and some are creepy men they met elsewhere or on the internet and were lured.
So I think Hannah Anderson's case is comparable.
And the recent case of the uncle by marriage who stole his young niece, sexually assaulted her for awhile until some men hunting them found him and the child and rescued her.
The famous case of Jody Plauche, the boy stolen by the karate instructor who had been molesting him (who was shot to death by the boy's father as he was extradited), is another.
There have been so many. One was a 12 year old (I think) who was taken by some man who murdered her mother. I think she was found in California by an astute observer who saw her leaving a store with a man and just felt something was wrong. And called 911.
There was one just last week or so. A 13 year old California girl stolen by a 34 year old named Papadonis. Popped I think at the Canadian border. Sadly, the mother was aware of the "relationship" and didn't seem too disturbed.
My memory of all these cases isn't that great. Many involve hiding in the woods or whatever. Some in motels or cars in different states. They all seem to last about one-two weeks before getting caught.
Maybe sleuthers can list the cases we've covered on here? And compare how long it took to rescue the kid and how?