You rarely see a review of a CP.2 lens, partly because of its price tag and its cine specialization. Here is a rather test by slrlensreview.com, who tested the CP.2 Distagon 35mm T/2.1 rather extensively.
The CP.2 line is supposedly a direct copy of its SLR line lenses, however the review noted "... we can generalize and probably claim that while both lenses offer superb center resolution, the CP.2 Distagon has a more balanced border performance..``, which is quite interesting.
Full review can be viewed at http://slrlensreview.com/web/
Also note that the author intends to do a comparison review later on to compare the CP.2 and its SLR counterpart.