AD group comparison - PowerShell

param (
	[string] $FirstUser = $(Throw "logonname required."),
	[string] $SecondUser = $(Throw "logonname required.")
)

$a = (Get-QADUser $FirstUser).MemberOf
$b = (Get-QADUser $SecondUser).MemberOf
$c = Compare-Object -referenceObject $a -differenceObject $b
$c | Sort-Object InputObject