How to show values by using 2 date slicer

Hi jhobzvel ,

I created a sample pbix file(see the attachment), please check if that is what you want.

1. Create two separated date dimension tables as below

2. Create two slicers with the date field from the above 2 date dimension tables

3. Create a measure as below to get the values

Difference = 
VAR _date1 =
    SELECTEDVALUE ( 'Slicer1'[Date] )
VAR _date2 =
    SELECTEDVALUE ( 'Slicer2'[Date] )
VAR _salary1 =
    CALCULATE (
        SUM ( 'Table'[Salary] ),
        FILTER ( 'Table', 'Table'[Date] = _date1 )
    )
VAR _salary2 =
    CALCULATE (
        SUM ( 'Table'[Salary] ),
        FILTER ( 'Table', 'Table'[Date] = _date2 )
    )
RETURN
    IF (
        ISINSCOPE ( 'Table'[Date] ),
        IF (
            SELECTEDVALUE ( 'Table'[Date] ) IN { _date1, _date2 },
            SUM ( 'Table'[Salary] ),
            BLANK ()
        ),
        _salary2 - _salary1
    )

4. Create a matrix visual as below screenshot

Best Regards