We too have a family member that's on the spectrum. I would recommend this lock. The lock can notify you when the lock is unlocked or locked. Although to answer your question specifically, the August lock changes the mechanism on the inside of the door and the outside stays the same. I personally think it would easier for daughter to use after she got familiar and used to the change.
If you are concerned with security, my suggestion is to add a slide lock that you see in the movies that lets the door open just a little and is on a chain (we did and the setup works great). But that's only a suggestion.