Is there a way to compare two IOJones files ?
For example version from 10.9.0 and 10.9.1 so I can find differences if a hardware don't works anymore.
Or export to txt/xml so external diff tools like FileMerge could be used ?
Your specific issue is caused by a transient IORegistry entry whose properties disappear too quickly, causing a bad access. The app itself has loaded and has begun listening for new entries; a new one is added and causes the crash while being created by IOJones. Try the previous app again, or this slightly different copy.