Well just so you know, there are physical disabilities that are invisible as well.
For instance, I have fibromyalgia. No one can see it, but it's there. I have arthritis, but not a disfiguring type, and no one can see that either. When I say I need to stop and rest, people wonder why? When you try to tell them about it, and the pain, they think you're just a malingerer. So it's not much different than this.
I know people with dyspraxia, and they look completely typical, till they start to speak.
We are all different, and it's probably a good idea never to assume another's life is easier or better, because everyone has something going on whether you can plainly see it or not.
My daughter has Asperger's and is gifted. I most likely have Asperger's as well, and I believe my dad did. Everyone on my dad's side of the family is fairly on the eccentric side, so i think it runs rampant. The most disconnected family of people you've ever seen too!
An adult with Asperger's gave me some fine advice, if the label gets you something you need, use it, If it doesn't, it's not necessary to tell those who don't need to know. Knowledge of this does not necessarily bring understanding. Not yet anyway 
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Bunni
That which doesn't kill me, makes me stronger, and really pisses me off.