Congrats on your girl!
I can't speak from quaker experience, but obviously (duh!) girls lay eggs. From what I have read about qp's, that is pretty much the only reportable difference. I will let qp owners speak to that though!
So, speaking from experience with other parrots- with girls, you want to discourage egg laying as much as you can (temperature, lighting etc etc) because of getting hormonal. But mostly, because of the potential problems of egg binding etc etc. So, always, always make sure your birdie girl has good cuttlebone and calcium supplements, healthy diet etc etc. I have girls of other species around here who NEVER lay eggs, others who lay here and there seasonally and ones who never stop. So, I can tell you- that despite the best of management you just never can tell, so you want to make sure that nutrition is there in your fids diet. I would also educate myself about what to look for (squatting, straining etc etc) in case of binding as a back up. It can be serious if it happens and even though you do everything right, it CAN happen- though its not highly likely to. I assume you have a good connection to an avian vet, thus the dna sexing!
But, imho- don't let girls scare you off! In my experience with other species, they are just as much fun to be with!

J