[Klaus]

The APD has less subject isolation than the non-APD. The non-APD will have about the same subject isolation as the 50mm f1, because the apertures are about the same size. From what I have seen, the 50mm f1 appears to have smoother bokeh than both 56mm f1.2 versions.

Could you please elaborate on your statement concerning the lesser subject isolation of the APD ?

The APD is a "gradual aperture". So, the further you go to the edge of the element, the less lights goes through. This results is more DOF, just like stopping down does. You get less isolation with APD from Fuji, STF from Sony or Loawa, or DS from Canon, than lenses without such elements. 

You can easily verify this in side by side images with the Fuji 56mm f1.2 and Canon RF 85mm f1.2, as both are available with and without such elements.

Fuji 56mm f1.2:
https://ivanjoshualoh.files.wordpress.co...12/a01.jpg
Canon RF 85mm f1.2:
DS:
https://downloads.canon.com/nw/learn/lau...51.2DS.JPG
non-DS:
https://downloads.canon.com/nw/learn/lau...F851.2.JPG
DS:
https://petapixel.com/assets/uploads/202...00x533.jpg
non-DS:
https://petapixel.com/assets/uploads/202...00x533.jpg

The Fuji APD filter has a light loss of merely ~2/3 f-stops - that's just irrelevant. How much effective loss does that translate to? 1/10th f-stop?
The Canon DS has a light loss of ~1.5 f-stops.