WoW Warrior Tank or pally Tank (Protection of course)?

Hey guys well I saw a lot of stuff like this but those were two years ago and for dungeons I want to know if a pally is better for tanking or a warrior. I have a 17 pally and he is really good as tank but most of the warriors in the dungeons say "wow i have more health then that guy let me be tank" when they got 2 handed wep... So, should i switch to a warrior or stay a pally? Tell me why, and I HATE the rage meter but I can most likely power through it if needed to.