Actually it matters, because they beat Miami. Check it out we lost to SF they lost to SF that's a wash, we lost to each other wash, they lost to Seattle (we beat them, puts us up 1), they lost to Jets (we beat them, puts us up 2), we lost to Buffalo (they beat them, puts us up 1) That's where it is right now.
But if we lose to Miami it's tied because they beat Miami, however if they beat Arizona they win the common opponents tiebreaker because we lost to Arizona. So losing to Miami can cost us the division. The game that really matters the least is Detroit because they don't play Detroit.
I think the best chance for us to win a tiebreaker is they lose one game to Giants and we beat Washington then we have better division record.