Harder? Easier? It depends.
A father that doesn't feel like he is that much of a help can make things harder than having no father. Some people can even resent having the father in the first place. And from there, the kid has to learn to grow up in place of what he/she perceives as a neglect of the father figure. I mean, picking up the slack of a father that "didn't" do much for the family speaks quite a bit.
But at the same time, not having that father figure to begin with could mean some lessons aren't there to be taught and the kids needs to learn it themselves anyhow. But this person might not know much of what his/her father was like and only know about the stories about his/her father.
I knew both types where people didn't have fathers while growing up and ones with fathers that is just....[insert expletive.] The one that did have fathers, it is sort of like having to take care of bullshit for an adult that can't handle it while you are the kid.
And I also know people who live just fine with not ever truly knowing their father and people who would call their father "hell" and still live just fine.