I just recently converted two whole CAD books in ArcMap for a client and the only issue that I seem to be having is getting the data driven pages to match up exactly to the CAD book pages. I understand that what is displayed in the layout is scale driven in ArcMap. I have looked through the forums from time to time and haven't been able to find much. Any suggestions?
Also ensure that the extent of your new page (in cm/inches) is the same as your old CAD layout (i.e. if the borders are larger or smaller then the extent will be slightly different too, even if the scale is the same)