Not to mention that both at wills function differently because they're both part of classes that have inherent bonuses to all attacks.
The ranger version has secret text: "if at least one attack hits, deal an additional 1d6 damage." The fighter version has secret text, "effect: the target is marked and subjected to the penalties imposed by your Combat Challenge class ability if it makes an attack that does not include you as a target."
The ranger version has secret text: "if at least one attack hits, deal an additional 1d6 damage." The fighter version has secret text, "effect: the target is marked and subjected to the penalties imposed by your Combat Challenge class ability if it makes an attack that does not include you as a target."