Hi,
You can use visECAD to compare both schematic and/or layout. You can download it from SupportNet.
visECAD - Software application originally created for viewing, collaborating, and cross-probing layout and schematic data in CCZ format. It has been enhanced to allow for comparisons of layout and schematic data. visECAD offers 3 different types of comparisons which compliments each other - graphical layer compare, data compare, and netlist compare.
regards, Charles