I use both and cannot tell a difference in how the draw them out in both the brood chamber and supers. I do roll an extra layer of wax on the plastic before I place it in the box. Because of this extra work, in the beginning, the plastic is more work than the wax. But in the long run, the plastic is less maintainence. When I harvest, there is no threat of a "blow out" when running the plastic frames thru the extractor.
My pattern is this: In each super, I place right in the middle, one rack of comb honey wax. The rest are plastic that are usually already drawn out from last year. This way, I get some comb honey from each super and plenty of extracted honey. The best of both worlds.
So, all of this to say again...I cannot tell a difference between plastic and wax in how they draw out. The plastic, TO ME, just seems alot less trouble in the long run.