$csvCreate:

Server Names Services Name
------------ --------------
abc           mn
123           OK
$csvCreate1:

Server Names Mounts
------------ ------
abc          OK
123          /etc/999

Server Names Services Name Mounts
------------ ------------- -------
abc            mn            OK
123            OK           /etc/999

$csvCreate = $csvCreate | Select-Object ServerName,Services
   $csvCreate1 = $csvCreate1 | Select-Object Mounts
   $finalData = $csvCreate +$csvCreate1
   $finalData | Export-Csv -Path $pathComparedServicess.csv -NoTypeInformation