Vespa launched a 100 cc scooter named XE. Later they launched NV which was 150 cc. A friend of my brother had an XE and he removed the XE stickers and pasted NV. At an intersection one guy was looking at his scooter a little confused so he told him. “It is an XE, I have just pasted NV stickers” The other guy thought for a moment and asked “Did it make any difference in performance”.