One might even say they are very nearly opposites, which makes it difficult for each to recognize when the other is experiencing their version of it. That's why I brought up the (to them) extreme isolation some allistics encountered for an extended time (perhaps two weeks or so if they were quarantined) in 2020. My very allistic, very social, high stimulous sibling was nearly raving like someone who'd been forgotten in a sensory deprivation chamber for weeks despite hours of zoom & phone calls each day + a full work schedule + deliveries and visitors to her window.