Django's ORM is acceptable - but I think Rails/ActiveRecord is superior albeit certainly more opinionated. Most likely just my personal bias speaking because Rails was the first web "framework" I cut my teeth on.
i've used both. they both have pros/cons. use whatever tool your team is most proficient with/stop wasting your time arguing about which framework is best
If you started from Rails and ActiveRecord, you're probably not be very appreciative of Django's ORM.