The Fiscal YTD field includes this fiscal year up to and including today's date. This Fiscal Year includes the entire fiscal year.
Note: The two fields return the same information if gifts are not entered into the future. For example, today is 7/7/2003. If you enter a gift for 7/8/2003, the two dates differ because the gift for 7/8/2003 is only included in the This Calendar Year and This Fiscal Year.