Unfortunately, there is no comparison tool for Drive Coach parameter files, but I suggest you use Microsoft Office Excel or a text editor from Software Informer database to open, edit and compare the files. Once you open a parameter file, you need to look at its structure. The file of parameters has a HEADER section and a PARAMETER section and it should look as follows:
Cell description line
Drive Title TAB Version TAB I.D. TAB Date TAB Time TAB
Cell description Line
Parameter 1 line
Parameter 2 line
For further information, I suggest you check the official user guide from the Drive Coach Help menu.