How to get all the dates from AdvancedDataTracking ?

I'd like to get all dates(include norm parts and different parts) from AdvancedDataTracking that compare two different revisions .But I can only get the different parts of the two vesion ,How can I get all dates (include the same parts and different parts）？
I use：
Set oWorksheet = ADTWorksheetConfiguration1.CompareADTWorksheet(ADTWorksheetConfiguration2)