living in Paris, we both have the JLC flagship store and the Patek "salon". I dress casually and I can tell you that the JLC people have always been very very professional, being for a clasp, an engraving or a "standard-price" watch. Giving me calls whenever they get this or that limited edition to come and try it out. Whereas Patek people have always been snob and looking down in a way that I find comical. Their salon is dark as hell whereas JLC flagship is bright and fresh, from basement to top floor.
As a customer, my vote is my money and JLC is where I put it.