FMDiff

FMDiff is a stand-alone application (Windows and Mac Universal Binary) that does not depend on other applications, plug-ins, or a Database Design Report (DDR).

It reads the original files, that's why it is so fast. Open FMDiff and drag the files to compare onto its window and click Compare. Seconds later your browser shows the difference report and all file information. Files of several hundred megabytes take a few minutes.