Well, some of them can become both. Ones who refuses "to please men" can be only actresses. Ones who object to "taking pictures" , can become whores only. You try both on each girl and see which one agrees to do what.
One advice tho: on girls level more then "pretty" and including pretty be sure the scale is full in red before asking her to do jobs for you as a hoe. As for actresses, they will auto ask you for a job themselves.