Could one mix these two archetypes?
They both change the Barbarian's Rage ability but they do it in different and seemingly compatible ways. For references here are the changed abilities:
When an urban barbarian rages, instead of making a normal rage she may apply a +4 morale bonus to her Strength, Dexterity, or Constitution. This bonus increases to +6 when she gains greater rage and +8 when she gains mighty rage. She may apply the full bonus to one ability score or may split the bonus between several scores in increments of +2. When using a controlled rage, an urban barbarian gains no bonus on Will saves, takes no penalties to AC, and can still use Intelligence-, Dexterity-, and Charisma-based skills. This ability otherwise follows the normal rules for rage.
A wild rager’s rage functions as normal, except that when she reduces a creature to 0 or fewer hit points, she must attempt a Will save (DC 10 + the barbarian’s level + the barbarian’s Charisma modifier) or become confused. For the remainder of her current turn, she attacks the nearest creature other than herself. On the following round, refer to the confusion spell to determine her actions. At the end of this round, and each round thereafter, she can attempt a new saving throw to end the confusion effect. The rounds during which she is confused do not count against the rounds she has spent raging that day, but she cannot end her rage voluntarily, nor can she use rage powers while confused.
Dangit. So house rule territory. Ah well.