Es posible los dos (Warrior y Paladin) tienen la abilidad del tanke. Los dos tienen una abilidad que.. they both can wear shields, they both can stun, and they both have stuff beneficial to tanking such as Paladin can increase defense, remove debuffs reducing the damage it takes, and increase defense when HP is low. Warriors can become immune to debuffs, fear and increase HP helping it to tank.
In my honest opinion, Warriors will make the best tank and a well played/geared Paladin can also tank. And I tried to write it in Spanish, but it's 4:30am so my brain gave up really quickly >.<