Lot of variables involved gofaster, to be sure.
Best example I have is between myself and my Dad.
He is about 5'10", with significantly better upper body strength than I have, but I am about 6'3".
I could out drive him every time. In my younger years, 310 yds was a pretty regular drive for me. I still hit about 280. My Dad would always fall about 20 yds behind me.
Even in his prime, he never hit the distance I could, and I used one of his clubs once, just see if it made a difference.
Upper body/torso strength actually plays a bit larger roll once you are off the tee. Keeping the club head speed when pushing through some grass or sand is critical to accuracy.
If she can qual with the men, then she should be able to play with them.
As far as prize money goes; PGA purses are significantly more than the LPGA purses are.