I was once told that it is more difficult, and therefore more rare, for a student to do basic science research -- especially in ortho. So, it may be beneficial to go that route. However, more programs have clinical research than basic science, so you may appeal to a broaded audience in the clinical realm. If you are able to be more productive in clinical research, you then should make sure that you ARE more productive, if you go that direction.
Well, kind of vague and non-committal. In the end, do something, do it well, and be interested in it.