The sharpness falloff of the 65mm is much smoother and therefore more pleasing if shoot wide open (The sharpness falloff, off both the 55V and the 38V are somehow rough, not ugly but noticeable different to the older XCD lenses). Other than that both lenses are great. I see no significant sharpness issues with both the 55V and the 38V, both can be used for landscape work and are, due to their light weight especially useful when hiking in the alps (or any other step mountains).
My whole workflow is aimed towards creating large format gallery prints and even then I can't observe any distracting or unpleasant sharpness issues in the corners. If you are a little bit like me you are probably deemphasis your corners anyway, using vignettes of some kind to direct your viewers eye towards the subject of the image.
Everybody's taste is different but I believe you wont be disappointed by the new lenses.

 

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