Whatever the college will pay.
I assume at first that the amout paid would be equivalent to the "value" of a scholarship.
Top players would earn much more $$$.
The "value" of the scholarship for women is distorted because of Title IX. It creates an artificial need for women athletes to match overbloated football programs, which soccer in particular (being a large team sport) fills. Title IX, however, may (probably?) won't extend if you pay the athletes salaries (depending on the structure) because now you aren't talking education, but professional sports. Again, the value for most women athletes will be zero.
Even then, for both the men and women, much of the soccer scholarship is funneled through academic scholarships to get around limitations on sports scholarships. There isn't much sports value here either. Really the scholarship is a premium being paid to the student to go to a lower ranked school than a higher ranked school at which they'd be required to pay full freight. It's a tuition discount, which doesn't translate necessarily to money out the door, because there's a difference between how people (and accountants) value unearned discounted income v. expenses out the door. That's why it's easier for merchants, for example to offer BOGOs or sales, than it is to just mark down their prices.
Yes, the top female soccer players would earn more $$$ (to the complete detriment BTW of the USWNT because Europe has definitively now caught up, if not yet surpassed the US, through its professional academy system in just a handful of world cup cycles). They would likely only be a handful of players at each of the very most competitive D1 schools.