compare 2 csv file and output new file

Hello

I have 2 csv file that i need to compare and output to a new txt file. Logic is if execlusion.csv list match sms.csv list, delete from sms.csv and write it to result.txt file. As example below, i am trying to get the value of (aaa4, aaa5, aaa6, aaa7,aaa8)

but i am getting (zzzz1,zzz2,asdf3,asdf4,tqer3,aaa4,aaa5,aaa6,aaa7,aaa8).. Please help.

$smscsv = import-csv C:\temp\sms.csv
$execusioncsv = import-csv C:\temp\exclusion.csv
$result = Compare-Object -ReferenceObject $smscsv.'computer name' -DifferenceObject $execusioncsv.'computer name' |% {$_.inputobject} | out-file c:\temp\result.txt

SMS.CSV