$WMIPkgList = Get-WmiObject -Namespace Root\SCCMDP -Class SMS_PackagesInContLib | Select -ExpandProperty PackageID | Sort-Object

$ContentLib = (Get-ItemProperty -path HKLM:SOFTWARE\Microsoft\SMS\DP -Name ContentLibraryPath)

$PkgLibPath = ($ContentLib.ContentLibraryPath) + "\PkgLib"

$PkgLibList = (Get-ChildItem $PkgLibPath | Select -ExpandProperty Name | Sort-Object)

$PkgLibList = ($PKgLibList | ForEach-Object {$_.replace(".INI","")})

$PksinWMIButNotContentLib = Compare-Object -ReferenceObject $WMIPkgList -DifferenceObject $PKgLibList -PassThru | Where-Object { $_.SideIndicator -eq "<=" } 

$PksinContentLibButNotWMI = Compare-Object -ReferenceObject $WMIPkgList -DifferenceObject $PKgLibList -PassThru | Where-Object { $_.SideIndicator -eq "=>" } 

Write-Host Items in WMI but not the Content Library
Write-Host ========================================
$PksinWMIButNotContentLib

Write-Host Items in Content Library but not WMI
Write-Host ====================================
$PksinContentLibButNotWMI