There are subtle differences between the ascii and Unicode including one includes three quotes while the other a single quote. The binary is different allowing for different integer sizes, also there are limitations with the dot notation such as It is possible to specify layout details with DOT, although not all tools that implement the DOT language pay attention to the position attributes. Thus, depending on the tools used, users must rely on automated layout algorithms (potentially resulting in unexpected output) or tediously hand-positioned nodes. try using Inkscape as an intermediary program