The right answer is overall people with more estrogen less testosterone will have softer skin. So for example if you start injecting right now given time your skin will become thinner and softer.

For the original question, who knows? It depends on shaving routines, skincare routine, workout routine, and the chemicals in your body. Sure maybe women have softer skin on average but is that because of chemicals or because they're culturally influenced they take better care of their skin than men on average? Maybe a dude has a more chiseled as but is that the testosterone or is that because he did a workout regime that put him in total caloric deficit and didn't really care to try and keep his ass fatty?

The question is as complicated as you want it to be assuming that the actual question is the difference between men and women's asses but you forgot women might read your post.

softer

I mean that really depends if you're talking about a bouncy soft thicc booty vs a ripped walnut-cracking amazonian ass.

In general, women tend to have more skeketal fat than men, especially around the lower abdomen, hips, and butt, while men have more viceral fat (around the organs). Anatomically, women's skin is also thinner, by up to 1/4in.

While it absolutely varies greatly by person, chances are that a woman's butt will feel softer and potentially more pillowy than yours. But the only legit way to find out is to find women who will consent to your scientific experiment.

I wouldn't know for sure but I'm assuming having a woman touch your dick also feels different than your own hand 🥴

Touching your own feels different than others, as you have both sides feelings at once.

But should you in a double blind test grab lets say 500 butts, with no other clue than your hand on their cheeks, how correctly would you guess which butt is male and which is female?