Wordpress started as a blogging platform and has grown into a content management system, where you can add features as/if your site grows. The basics of WP can be developed by yourself, and it's free, but it's a learning curve if you don't have knowledge of the basics.
WIX is a company that helps you create simple websites (and more complex ones for a fee), and it's reliable. Look for what do you want to have in your site. Do you want a forum, galleries, are you going to be selling something? The responsible answer is always "depends", because it depends on what you want to do with your website.