Curation Trail is when other people sign up to have their account vote on the posts that you vote on, whereas a fan base is for people to vote specifically on what you post. So a curation trail would be more about seeking out other content to promote and reward, while a Fanbase would be best utilized for things like raising money for charities where the direct vote on your post helps some cause or other.
Hope this helps!
Yup, it did. Thank you so much!
https://steemit.com/funny/@isabella69/this-is-steemit-rule-34-in-action-yes-this-is-a-real-porn-video-sfw