How can people be so sure this is a genderswap when it's long been established there is a spider-girl, and not just one but two or three at some point.

Selvokaz said:
How can people be so sure this is a genderswap when it's long been established there is a spider-girl, and not just one but two or three at some point.

Because none of the spidergirls aside from 2099 used anything remotely similar to the classic costume.

And just in case there was any lingering doubt, both the description and one of the pixiv tags declare it to be a genderswap. So there you go.