I think it depends on the situation. In my case I rarely work with another woman, which makes it a sought after event for my fans! I can easily make a lot of money if I advertise the show ahead of time.
I’d like to know the answer to this as well. I’ve always worked solo, so I don’t have any experience in either regard. I know I could probably make more by working with another model, but I would rather avoid the potential drama!
I’ve worked solo, with a female model, and with a male model, and personally, I made more money working with the male model than with the female model. Of course, I only worked with a female once and with a male once, so I’m not quoting long-time averages or anything like that. For the most part, I work alone, so the vast majority of my income comes from solo modeling.