Controlling the number of records during Data Comparison

When you run through the Data Comparison wizard, you can control the number of records used within the process through checking/unchecking the various record sets: Identical Records, Missing Records, etc. However, there does not appear to be a way to limit records during a Data Diff from the right mouse click menus. So, if I right-click on a table and Send To -> Data Diff, I would be performing the operation for ALL records in the selected tables. Am I correctly understanding that we do not have a setting for limiting the records used as part of the Data Diff process?