A. aetherea is similar in appearance to A. keyserlingi, however female A. aetherea are generally larger than A. keyserlingi. Like most orb-web spiders, A. aetherea shows considerable sexual size dimorphism, with females being many times larger than males.
A. aetherea is comparable to A. keyserlingi visually, but females of A. aetherea tend to be more substantial. Orb-web spiders generally display notable differences in size between males and females.