As someone who's worked with both Rails and Django professionally for years, Rails is far more mature. Both are quality frameworks, but Django has far more warts, and the quality and number of good third-party libraries really isn't close. Django has forms and the admin going for it, and South is really excellent, but on the whole Rails feels better thought-out and more flexible than Django.

Django is very strong as a rapid-development tool (forms, generic views, admin), but I am more comfortable with Rails for a project with a reasonable timeline. Django class-based views are a far cry from Rails controllers.