Understanding my 17 year olds diagnosis and ADOS score

My son finally had his assessment and got his diagnosis this week. His diagnosis is Autism

it was his 3rd and final appointment/assessment

but they didnt say what 'type' of autism he has.

he scored 20 in his ados assessment-they told us that anything above 10 is a diagnosis of autism

I asked what type of autism does he has? and asked if it is asd/aspergers, but he just said that is is all types are classed as "autism"

if was confused but as my knowledge is only basic, but i wanted to know his level but i never got a straight answer

we are awaiting a report in the post but until then i was hoping somebody may be able to help regarding his ados score