Title: "Comparing Test Cases Between Different Versions in Power BI"

Hi Anonymous, try this approach:

Test Case Status = 
VAR _CurrentTestCase = SELECTEDVALUE( 'Table'[Test Case] )                      //obtain TestCase from current row
VAR _CurrentVersion = SELECTEDVALUE( 'Table'[Version] )                         //obtain version of currently selected TestCase
VAR _VersionToCompare = SELECTEDVALUE( 'Compare version'[Version] )             //obtain a version you want to compare to

VAR _CurrentTestCaseALL =                                                       //let's get all unique values of the version of the currently selected TestCase. It will be used to make comparison of item presence in prev version
    CALCULATETABLE(
        VALUES( 'Table'[Test Case] ),
        REMOVEFILTERS( 'Table'[Version], 'Table'[Test Case] ),                  //remove any filters applied on 'Table' 
        'Table'[Version] = _CurrentVersion
    )
VAR _ToCompareTestCaseALL =                                                     //now let's get all possible unique values of TestCase we want to compare to 
    CALCULATETABLE(
        VALUES( 'Table'[Test Case] ),
        REMOVEFILTERS( 'Table'[Version], 'Table'[Test Case] ),                  //remove any filters applied on 'Table' 
        'Table'[Version] = _VersionToCompare
    )

VAR _CommonRows = INTERSECT( _ToCompareTestCaseALL, _CurrentTestCaseALL )       //returns only rows present in both versions
VAR _NewRows = EXCEPT( _CurrentTestCaseALL, _ToCompareTestCaseALL )             //get only new rows, i.e. present with TestCase of ToCompare version

VAR _Result =
    IF(
        _CurrentTestCase in _NewRows,
        "New in " & _CurrentVersion,
        "Present in " & _VersionToCompare
    )
RETURN _Result

Make sure to turn on single select for filters and create a disconnected table with version values:

Good luck! 🙂