Question about the difference between Stereotypic Movement Disorder and Autism Spectrum Disorder

Most things assigned with "Dis-Order" or out of order are all still under research. They keep getting thrown out of the DSM or re-worded.

All disorders are contrasted against Neuro-Typical society. In any given society the target for how the majority thinks, perceives, socialises and understands life can be subject to change but most are wired for Tribal Inclusion while Autistic individuals tend to be Wired for more analytical components of society. 

The better question to ask yourself is what your strengths and weaknesses. What are your natural talents and are you open to growth? Can you be a better version of yourself. On my fathers side, we tend to be more critical, so it's important to recognise not to be critical of humans but of things / systems. On my mothers side we tend toward entrepreneurship, and that can be isolating, so it's important to always be open to critical feedback about ambition and not just run over others for the sake of my own goals.  

I wonder if it is useful  to consider myself disabled, but to understand what my strength and weakness are.

You can do both! A Dis-Abled-Ness has a few sides to it. On one side is all of these basic functions most of the population can do. Pay bills on time, work a steady job (even if self-employed), have a few harmonious relationships, not hurt themselves but by accident on rare occasion, drive a car. 

But not being able to participate due to a disabling factor is a real item. Some cannot tie a knot, but luckily they can wear clogs. Others need more assistance. Some would function fine if certain external (rather than internal) factors in society weren't disabling. If you lived in a cannibalistic tribe and couldn't stomach it, you'd probably experience being disabled as food is necessary and tribal inclusion is necessary and also, you wouldn't want to get eaten. In modern society, a certain kind of telepathy is expected around NeuroTypicals, and without this one can be disabled. 

But. while it's good to recognise internal and external factors we're still human and have something to contribute. Even if we don't know it yet. So yes, Find what you're good at and where you're limits are. Find out if you can get better and if your limits are a hard limit or if there's just missing information. 

JuniperFromGallifrey said:

a certain kind of telepathy is expected around NeuroTypical

I cannot do that because of alexithymia, instead I use misdirection, hiding in plain sight, and maintaining as smallest as possible group of people I meet on daily basis, eventually they start to think about my bluntness as normal, and see only misdirection, that is usually openining for a joke, one of my design.

iIf I say a joke in front of group of neurotypicals, there is always someone who finds it funny  and starts laughing, others stay silent or join, and so they no longer focus on me.

JuniperFromGallifrey said:

a certain kind of telepathy is expected around NeuroTypical

I cannot do that because of alexithymia, instead I use misdirection, hiding in plain sight, and maintaining as smallest as possible group of people I meet on daily basis, eventually they start to think about my bluntness as normal, and see only misdirection, that is usually openining for a joke, one of my design.

iIf I say a joke in front of group of neurotypicals, there is always someone who finds it funny  and starts laughing, others stay silent or join, and so they no longer focus on me.