So long as the Moroccan style is covering and wide, and covers all the body, it is better for you to wear it, so that you will be like other righteous women in your country, and you will avoid wearing clothes that single you out and attract stares and may cause you harm unnecessarily.
You can wear a khimar on your head that will come down over your shoulders, and this will serve the purpose of covering the shoulders.
See also question no. 6991.
And Allaah knows best.