I had a chance to work with a professional model Justina, who is doing the majority of her modeling in China. I've discussed this topic a bit before, how working with a pro model is different to working with an aspiring new model and besides all the other differences it is simply much faster.
You can get good results with anyone, if you know what you expect for the final look with the difference being that you get those shots with pro model faster, due to their experience they know how to listen, they now the terms, they know their poses and what is probably also very important a good pro model knows how to work the light with any current setup with a little guidance needed.
Nikon D3s Nikkor 50mm 1.4G @ f/2 1/500 iso 200 + Available window light
David @BeScouted