Armenian Diaspora

Why do so many Armenian immigrants abroad come from the western part of country? Is it mainly due to history with the Ottoman Empire or are there more reasons to it?

Also on this topic, which region of Armenia is nowadays generally better off financially, education and job wise, the western or eastern half?

Why do so many Armenian immigrants abroad come from the western part of country? Is it mainly due to history with the Ottoman Empire or are there more reasons to it?

Also on this topic, which region of Armenia is nowadays generally better off financially, education and job wise, the western or eastern half?