I dont think it's bad as long as it is brief in one but thorough in the other. I had the same dilemma and got some advice about it- I'm going about it making sure that I have minimal overlap whatsoever, BUT if I do have a work/activity that I elaborate on in my PS, I will not use that activity as one of my most meaningful experiences, and will also keep the 700 character description as brief as possible. hope that makes sense.