Yes I have, I know PAs and PA students. It's another amazing profession which is in high demand, as people don't have to go to medical school and still make a very good salary. I chose PT because of what I enjoy / feel more passionate about.
I know my PT program will offer me in depth education of evaluation of the MS and Neuro systems and pathologies, along with interventions. I know my student PA friends learned about brief evaluation skills to identify something wrong, which they don't go nearly as in depth in (or have the time to), and a lot of their intervention strategy is "Refer to PT".
Not that you should choose one over the other for difficulty of school (as both are difficult), but from what i've gathered PA programs are VERY time demanding and difficult. One of my closest friends is in a PA program which is known as one of the best, and this semester he is currently taking, and I **** you not, 40.5 credits. They jam pack your first year with so many classes so that your second year is all clinical work.
Good luck with your decision making