In pvp, you are generally going to find the "tanky specs" are bunker guardians, they just do it better than warriors. Warriors have superior cc and can run a very effective bruiser build with axe/mace mace shield, which has a good mix of cc, dmg, and survivability. But no, a warrior is not going to tank as well as a guardian. Guardians can go full tank and still run retaliation to pump out damage, a tanky shout heal hammer warrior is going to do no damage and still go down quicker than a guardian.
Edit: I exclusively play warrior and previously guardian for my team and guardians tank and node control is just plain better, retal op
Edited by Ship, 30 September 2012 - 06:10 PM.