Do I have to change up an article before submitting to several article directories?

According to me you can spin your article after submitting your article on 10 sites. Their is no harm in submitting your same article on different sites but it will not much helpful.

 

In my word you should change you article by re-writing it first, It will give your article a new face. If you submit same article to all directories it will be cosider as a dublicate content.