php - Compare two array and if an index is identical delete it

How can I delete an array index by comparing it to another array index?

PHP:

    $results = array ( array(
            "Name" => $NameUser, 
            "Surname" => $SurnameUser, 
            "MyComment" => $MyComment,
            "VideoPath" => $VideoPath,
            "Reg_Date" => $Reg_Date, 
            "ThumbPath" => $ThumbPath, 
            "UserId" => $UserId
            ));  
    print_r($results[0]); // Array ( [Name] => aaa [Surname] => aaa [MyComment] => aaa [VideoPath] => aaa [Reg_Date] => aaa [ThumbPath] => aaa [UserId] => aaa)

$JSON_List = file_get_contents('test.json');
$arr = json_decode($JSON_List);
print_r($arr[0]); // stdClass Object ( [Name] => aaa [Surname] => aaa [MyComment] => aaa [VideoPath] => aaa [Reg_Date] => aaa [ThumbPath] => aaa [UserId] => aaa )

I can see these two indexes are identical, I am using a for loop but it seeks that php are not seeing them as identical.

How can I compare the array properly and if identical remove the identical array index from the list?

PHP:

foreach ($arr as $index)  {

    $countIndex++;

    print_r($countIndex);

    if ($arr[$countIndex - 1] == $results[0]) {

        print_r("array is identical \n");
    }else{

        print_r("array is not identical \n");
    }

}