Output a variable of set type as a string

As this example shows, even though the outputs look the same, they are different.

Code

var( People_Set = set('John Doe','Jane Doe', 'Joe Surname', 'John Doe') )

var( People_String = $People_Set->asString )

'People_Set: '+$People_Set+', is type: ' + $People_Set->type + '\n'

'People_String: '+$People_String+', is type: ' + $People_String->type

Result

People_Set: set(Jane Doe, Joe Surname, John Doe), is type: set
People_String: set(Jane Doe, Joe Surname, John Doe), is type: string