If you buy a Cartier ring you want people to know it is a Cartier ring or a diamond, or a piece of art that's giving an emotion - then people read it and say, "wow that's really amazing". With prêt-à-porter you see people in the street, in a club, in a restaurant or whatever, and you think, "Oh my god, he's wearing my trousers!" In a way it's more open - people can put together the way they want - mixed with other designers.
