DWG Diff - Version 1.0.0.9 This utility is a standalone tool that is useful to find differences between to similar drawings. Compares all drawing entities in the selected drawing space (Model,Layout)Compares all other drawing structures such as: Layers, Blocks, Text Styles, Layouts, etc.Compare dwg drawings from R12 to 2007. Creates three separate views outputs (A not B, B not A, and Common). Comparative output can be saved as dwg, dxf, pdf.