In Barbra the main difference is that you can take notes and have your flashcards in one place. I noticed I often had to transfer my class notes from Evernote and copy them into Anki. That was a huge hassle.
Another point is that in Barbra sharing flashcards and notes is the default. You invite people, set goals together, and then collaborate on everything. I noticed we always sent photos of notes on Whatsapp to others before tests, and that was a hassle as well. So we built thinking of these 2 things.