astrobuoy
Established
I can only speak for the Leica 50 APO; aside from a neutral bokeh, contrast at the plane of focus is so high and that of the OOF foreground & background diminished that the images have a 3D character to them that you can’t get from any other 50 that I have used. Plane of focus is dead-flat, distortion is near-zero. I think I have rarely shot it at f/4 or 5.6. Really stunning results.
Do you have any shots on film with the Leica APO lens? I'm curious how this new Voigtlander APO will render on film, and whether it's just overkill in terms of resolution (though, as others have said, there's also the color fidelity to think about).