Hence the introduction/ evolution of the dual seat / or twin seats, quite soon in the Vespa production run
it took Vespa a while to add a second seat or offer the dual seat
wheras Lambretta offered a passenger seat option right from the start with the model A , launched the year after Vespa launched V98- as I said in an earlier post in this thread, IMO Lammys tended to have more success as a fanny magnet