I am looking for a script which allows users to register and post their owm articles in various categories. I reached these two, joomla and wordpress. Wordpress allows us to add multiple authors and they will be able to write articles. Lot of templates are available for wp. In joomla, it is a good cms and it is built to allow authors to write articles and is easy to manage users. But joomla's backend is not customisable and Joomla themes are not that easy to get. So which script should i use for such a site, joomla or wp?
I would personally choose Wordpress because of how powerful it is and what you can do with it. There are also loads of plugins for WP that have things related to the backend, multiple authors etc. Good luck!