Ummm... That Rei quote is basically the opposite of what you are suggesting. Rei is saying wear clothes based on how they make you feel, NOT how they make you look to others.
Also, if someone wants to wear SLP, isn't saying, "you should wear Rick Owens" kind of like saying, "Just go be a different person."
I mean, sure, there are probably a bunch of basic tees and stuff that you can match between the houses, but the aesthetic couldn't be more different. I would be floored if Rick Owens made a teddy at all comparable to the one that Adrian is wearing... if Owens has even made a teddy jacket...lol.