I'm talking about, specifically, looking at the natural capabilities and overall success of people who are identical twins and one twin has, but the other does

I'm talking about, specifically, looking at the natural capabilities and overall success of people who are identical twins and one twin has, but the other does not, a given disorder. Autism, OCD, anxiety, depression, bipolar, schizophrenia, ADHD, dyslexia, are the ones I am aware of. I'm sure there are many more.