Compare CSV - exclude if changed from this to that

Question

I am using the Compare-object command to compare a CSV file.  I am successfully using this to find the difference between two csv files: 
compare-object $yesterdays $todays -Property EMPLID,GROUP_NAME -PassThru|?{$_.SideIndicator -eq '=>'}|
?{$_.GROUP_Name -eq 'FacStaffStudents14Spring' -or $_.GROUP_Name -eq 'Students14Spring'} | select * -ExcludeProperty MIDDLE_INITIAL,SideIndicator| Export-Csv $getquota -NoTypeInformation
How would I also exclude entries if they got changed from group name FacStaffStudent14Spring to Students14Spring or vice versa?

Answer 1

This question was actually answerable.  I was able to get it figured out on another forum.
compare-object $yesterdays $todays -Property EMPLID,GROUP_NAME -PassThru | Group EmplId |
Foreach {
New-Object PSObject -Property @{
New = $_.Group | ?{ $_.SideIndicator -eq '=>' }| ?{$_.GROUP_Name -eq $FacStaffStudents -or $_.GROUP_Name -eq $Students}
Old = $_.Group | ?{ $_.SideIndicator -eq '<=' }| ?{$_.GROUP_Name -eq $FacStaffStudents -or $_.GROUP_Name -eq $Students}
} |
Where {
$hasChangedFromFacultyToStudent = $_.Old.Group_Name -eq $FacStaffStudents -and $_.New.Group_Name -eq $Students
$hasChangedFromStudentToFaculty = $_.Old.Group_Name -eq $Students -and $_.New.Group_Name -eq $FacStaffStudents
return -Not($hasChangedFromFacultyToStudent -or $hasChangedFromStudentToFaculty)
} |
Select -ExpandProperty New | ForEach-Object { $_.PURSE = "5"; $_ }|
Select * -ExcludeProperty MIDDLE_INITIAL,SideIndicator | Export-Csv $give -NoTypeInformation