Dress is related to society not religion. How is it possible that a religion which was revealed for the whole mankind insists for a particular uniform? Same is the case with beard. Beard is the extremity of the love of Prophet Mohammed (pbuh), where a lover wants himself to look like his beloved. However extremist scholars lay stress on beard and dress leaving basic principles aside.
Islam is not outward appearance. The change should be from within first then outward appearance will automatically change.