Hi Kelly. Thanks for your interest in our paid add-ons to The Events Calendar core/free plugin.
The Events Calendar PRO add-on is separate from the Community Events add-on. There is no overlap in features if you buy just one of these two.
Last but not least, we have a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
Let me know if you have anything else I can clarify for you or if you need help determining which add-ons will work best for your setup.