Many thanks for the information. Meanwhile i searched too. I cant say what is right or wrong or have a better option for SEO, because the algo is a kind of black box. I also found good articles which says a subdirectory is better and they have anaylses. They also say, that google says that there is no difference, but tracking this, shows the oposit. Here are the link, which seems to be from this year: SEO Subdomain or Subdirectory