My impression of male Chareidi Jews is that they only ever wear a white shirt with a black suit shoes and hat, no tie. I also get the impression that particular other (possibly Chassidic) groups have a uniform which they all wear. Please correct me if I am wrong.
Why do they do this? Is there something wrong with looking different in their culture? Does the particular ensemble have significance or is it just a common expression of sober, severe dress?