There is nothing inherent to the doll about that distinction, but it is true anyway.
It goes even into how they did her eyes compared to a normal barbieWell, they didn't take a standard Barbie, and just slap the word "autistic" on the box. There are some design bits on this Barbie that are to support the distinction.
She is holding a fidget spinner, for one (admittedly small) thing.
For another, she has articulated wrists and elbows, that other Barbies don't have, to enable stimming motions during play.