As far as I understand it, the door shell should be the same. You can simply reuse all your old interior hardware (like door panel, handles, locking lever, striker, chrome trim, etc), but the door shell is the same. Of course, each door was hand-fitted to match the body, so there might be some differences in the gaps once you replace the shell.
Also, some folks have mentioned that the mounting holes for the early goose-neck side-view mirror are different from those of the later type. This means that you may need to do some aluminum filling/welding to get it right, before you have the door painted.