I believe Flask actually has the advantage in the ORM since you aren't tied to Django's strictly RDBMS structure and Flask will allow you to easily use NoSQL solutions if that's your thing. Flask with SQLAlchemy is just as powerful as Django's ORM.
Flask does have an admin plugin but it's nowhere near as good, polished, or documented as Django's.
Django does have the advantage of a bigger mind share, users and ecosystems.
Flask does have an admin plugin but it's nowhere near as good, polished, or documented as Django's.
Django does have the advantage of a bigger mind share, users and ecosystems.