I'm shopping for a 35mm macro lens, and trying to decide if I should get a 35mm one or a DX one. For 35mm macro, a DX-format lens might actually be BETTER than a 35mm lens. Coverage should be no problem with extension rings or a bellows, and I assume DX lenses are at least as sharp or sharper than 35mm lenses within the limits of their coverage.
I would not assume anything but rather check the resolution of both types of lenses. Due to the limitations of the digital sensors lenses for these cameras can have lower resolution.
A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.