Hey @gaylenevandusen,
While Events Calendar Pro has never had the community-submission features of Community Events, we indeed have a detailed breakdown of the features of each plugin.
You can find a detailed feature breakdown for Events Calendar Pro here: https://theeventscalendar.com/product/wordpress-events-calendar-pro
When it comes to Community Events, basically if you just have Community Events and the core plugin you will have NONE of the Events Calendar Pro features listed above. You will have the core calendar features, and then the “community submission” features where users can submit events to your calendar.
You can learn more about Community Events here: https://theeventscalendar.com/product/wordpress-community-events/.
Finally, as for getting a “renewal” rate, this depends on how long ago your license expired. It seems like it expired in May 2015, so a renewal discount is unfortunately not valid anymore 🙁
Thank you,
George