CV 35 APO compared with CV 35 1.2 III, both stopped down to f/5.6 on the M10-R.
No corrections have been applied in C1. Note that C1 is the superior post-processing program (IMO) for corner sharpness since it has a sharpness correction slider in the Lens Correction panel that applies sharpness more toward the corners and based on the lens profile (sharpness is applied generically more toward the corners without a profile). This considerable helps all lenses, but particularly lenses like the CF 35 1.2 III that are a little weaker toward the corners, but still acceptable. I'll make a separate post that shows the difference with the correction applied.
Keep in mind I don't use a tripod (framing is slightly different) but shutter speed was 1/500 second, so that should mitigate any movement on my part. I also had my elbows resting on the top of a fence and the camera held against my face. Both shot at infinity stop as none of my CV lenses thus far hit infinity before the hard stop. Both show perfectly focused on infinity according to the rangefinder. I also shoot in rangefinder mode on the M10-R to avoid any shutter shock from the shutter having to close to stop Live View before it can reopen to start the exposure sequence. Unfortunately there is no EFCS or ES mode on the M cameras yet.
Tests like FM's will be more reliable due to tripod, framing consistency, and verifying perfect infinity focus in live view.
Tests at higher res on bodies like the A7R4 may show more differences.