... all day long. The words that immediately came to mind when I saw the pictures of each one in your post were "elegant" (3940) and "cluttered" (5140).
To me, the 3940 is one of the great Patek designs and definitely one of the most beautiful modern era perpetual calendars out there. Hence, it boggled my mind when I saw the limited re-issue 3940 at the Grand Exhibition in London, with a salmon coloured dial (stunning) but 5140 configuration (huh?).
Regards