I would be with briggsy's girl and likely to give you a big f you... Unless you did it in a way that drew on your experiences and was totally caring and non-judgemental.

Maybe like, "I've noticed that X does this and that. My daughter also did this and that. We found that those behaviours totally improved when we had her diagnosed and receiving treatment for her ASD. Do you find those behaviours challenging?" (I know little about ASD so excuse the possibly incorrect language).

Maybe also getting her talking more about her child and leaving her to join the dots that your daughter did / does that due to her ASD. Mothers are generally not stupid and I think done properly you could be a real help to her. But it's a fine line to walk.