Couldn't agree more with the OP on this one. The '39s are just have more of that pure 'pre-war' aero styling, whereas the '40s seem to be the first Fords to debut what was to become the strait-edged and more-adorned 'post-war' look. Thats probably why they held sway in the post-war world because they fit better within the contemporary aesthetic.
When I was shopping for our family sedan, I wanted a pre-war car and we ended up with our '39 DeLuxe Tudor. Its not the '38 Standard that I dreamt of, but the '39 has been everything we asked for and we won't be looking back...