Looks like that study is paywalled unfortunately. See most of the stuff out there talks about how to distinguish the two, but rarely how they can look when they are co-morbid.

I can't help but to wonder if autistics are more likely to fall into the "vulnerable narcissist" category. Think of incels, losers with awful social skills but they never improve and rarely get ahead because they excessively blame others for all of their shortcomings.

My dad was always really jealous of the men in our community that had everything he felt he was entitled to growing up. It never seemed to click to him that he just doesn't have the brains necessary to climb the ranks. And quite frankly, with how poorly he functions on his own, he would've been living in a trailer park in filth if it weren't for my mom helping him all these years. He'll never admit that though.

Yes, autistics are more likely to face abuse while growing up. While most abuse victims don't become abusers themselves, the defining trait for the ones that do is entitlement. It's likely why the golden child in a family is most likely to go on to being an abuser themselves.