For those trying to decide between these two fast Canon lenses adapted to a Sony E mount A7 body, these comparisons may be helpful. I shot this scene to show relative DOF, bokeh rendition (mostly in the lower right foliage), sharpness and CA (mostly on the light bulb on the tree).
Here is the link to Flickr: https://flic.kr/s/aHsktMFrvA
A few observations:
The 0.95 cleans up A LOT by stopping down a stop or two... low contrast haze almost disappears, sharpness improves dramatically, CA gets better, vignetting goes away, and yet the magic dust remains.
The 1.2 (use here with the latest Metabones adapter) has the obvious advantage of AF for moving targets. It has none of the veiling haze wide open found on the 0.95, and is sharper and contrastier throughout (as expected of a modern L series lens). Oddly, it does seem to suffer from much stronger CA. Overall though, when shooting wide open, its bokeh is still VERY nice, some might say better, I would say smoother.
Personally, I wanted the 0.95 for the crazy OOF bokeh rendering, and now that I've done this test, will probably shoot everything at 1.4 or 2.0, since the magic remains, and the technical qualities improve.
Hope this helps anyone else deciding between these lenses.