Both dramas follow the exploits of stay at home dads in communities that don't appreciate their non-traditional roles. While the issues of gender roles and inequality are heavy, both of these comedies lighten it up :) Dare Yori has more colorful characters than At Home Dad, but both are good.
They tell the stories of men who suddenly become the primary caretaker of children in a society that values the tradition of female caregivers. I think Marumo is more complex (and better) than At Home Dad, but they are both good and worth watching if you like family dramas.
they are both shows about a person who is peculiar and sticks to their rules and peculiarities and still they manage to make friends.