Oi, something worth saying maybe...
If you take a man and a woman at the same height and BMI, statistically, the man will probably have a higher BMR, and thus be able to eat more calories than the woman, simply because he would have a lower body fat % and more muscle. If a female model had a body fat % under 8% she would probably have a lot of health problems, while that % wouldn't be too unusual for a man.
On top of that, I'm pretty sure the average female model maintains a lower BMI than a male model, further decreasing how many calories she can eat. I won't mention height because that one is obvious and I like to think that our appetite is a least a little proportional to our height (again, outliers obviously exist).
Although I don't doubt that many male models are incredibly strict about their diet, or that some outliers exist, I think it's safe to say that on average, female models would restrict more than male models.