> distinctive features of ADHD both in diagnostics AND treatment (both are usually treated with cognitive behavioural therapy and in more severe cases medication)

Uh, what? How exactly could treatment be more distinct than ADHD people being indicated for a highly-regulated drug like amphetamines, which are extremely effective to the point of being life-changing treatment? Meanwhile nobody would consider prescribing Adderall to treat autism. What a bizarre conflation of two completely different disorders.