And yet, I suspect it is different.
Yes it is different. Part of autogynephilia (AGP) is the sexual thrill of people reacting to you as a woman. So, a woman's mere acceptance of that person in their bathroom, could be arousing. It's also exciting to coerce people into explicitly accepting your womanhood. (Pronouns, 'girl talk')
It's not so much that they are predators first and foremost. As in our usual idea of predation (although, obviously some are).
It's about everything to do with womanhood being a sexual thrill. It can get bizarre, and extend to biological functions such as menstuation, breastfeeding, pregnancy, etc.
An earnest and empathetic discussion over your period cramps, will actually be a turn on.
Women often do notice that there is something off about someone with AGP. There is zero real affinity with womanhood. And it becomes clear that there's an unhealthy interest in intimate issues.
But it's not always immediately obvious and you end up realising you have been the unwitting, and unconsenting participant in someone else's fantasy/fetish.
Funnily enough your point about bisexual women is often used to counter women's objections. Along the lines of "well bisexual women and lesbians share your spaces, so you are already in a position where someone might be fancying you".
Unsurprisingly, I have never yet seen a woman, feminist or otherwise, agree with that viewpoint!
Bisexual women and lesbians are still women. And they are not in the cohort who present a problem.
And it's a killer for genuine transsexuals, who are usually not attracted to women, in the first place (unlike AGP individuals). Gender dysmorphia is their motivation, not sexual kicks.
They tend to have far more understanding of, and affinity with, women, on a genuine level. Including in the bathroom issue, etc.