The merits of each therapy may be discussed in the future but at this time, I'm just going to give you the information to research since there are so many options. I have a few more "basic" blogs to post and I have limited time to do them so discussion on each isn't on the table for me right now. I hope that, for now, this is will help you in your research.
Verbal Behavior Analysis This is still ABA but with a focus on language and communication. There is a good, detailed explanation of it that is downloadable in PDF from Coast ABA. I would have added a hyperlink directly to it to view as an html but I'm just not that computer savvy yet.