Historically, Django Admin is better (in terms of ease of use and flexibility) than anything equivalent in Ruby, but Rails has better conventions for tests and routing. (Or at least that's my opinion.)

I also like ActiveRecord + Arel more than the Django default ORM, but that's more so preference driven by like the Ruby AR syntax more than the Python. (And a general unsupported opinion that Ruby is a slightly better/more pleasant language for writing code than Python.)