A femboy’s asshole and a woman’s asshole feel completely different when you touch them, fuck them, and pull out after cumming. They’re not the same thing.
A woman’s asshole is right next to her vagina, with a thin membrane between them. Stick a finger in and you can feel the soft vaginal wall beside it moving gently. If your cock is thick enough, you can even make the vagina move along with it when you fuck her. It’s wet and slippery inside, so the asshole itself isn’t as “tight.” Many women don’t train their assholes, so they tend to be pretty tight, but because the vagina and uterus pull on the surrounding tissue, the tightness changes with the menstrual cycle and during orgasms. Sometimes it suddenly clenches and releases, like it’s actively biting down on you. Cum you shoot inside sometimes flows along the perineum to the vaginal opening, or she can scoop it out with a finger.
A femboy’s asshole is completely different. Femboys are male, so all they have back there is a rectum and a prostate—no vagina. When you stick your cock in, the first thing you hit is that hard little lump of prostate tissue. The moment you press against it, the femboy will give a sudden shudder, their lower back will go weak, and their little cock will stiffen up and start leaking on its own. Since there’s no vagina beside it to support it, the flesh of the asshole itself is more “solid.” Fucking it feels more like pushing into a straight length of intestine, with more noticeable resistance. Many femboys stretch themselves out with dildos or fingers. Once stretched, it loosens up, but the moment it tightens, it clamps down hard. There’s none of that feeling women have of “there’s another hole beside it helping cushion the pressure.” When you cum, it goes straight into the rectum. When you pull out, you bring out a thick stream of cum mixed with intestinal fluid, and it smells stronger.
To sum it up in one sentence: a woman’s asshole is “there’s a pussy right beside it, sharing the pleasure,” while a femboy’s asshole is “it takes the pounding on the prostate all by itself until your legs go weak.” One is two holes working together; the other is getting fucked purely in the ass until you have a prostate orgasm. The pleasure is completely different. If you like something tight that clenches on its own, a femboy’s is often more intense; if you like something wet and soft that you can also rub against the slit beside it, a woman still feels better.
They’re both assholes anyway. One comes with a vagina, the other with a prostate. Take your pick.