You can export the same type of 6.x data to a data store file multiple times. If the data on the 6.x server changes between exports, then subsequent data store files contain differences. You can use the StoreDiff utility to compare two data store files.
When you compare two data store files that are different, a data store file is created that contains the differences. You then use Store Browser to view this data store file and see the differences. You can use this information to determine the data to import. The data store file that StoreDiff creates cannot be used to import data into Symantec Management Platform 7.5.