Horde General: 800,000 health. He doesn't aggro unless you go past the stairs, which basically means getting within five feet of him.
Alliance General: 1,200,000 health. If you even set foot in his room, you get wafflestomped.
Why would Blizzard give the Alliance general 400k more health? IDK, I'm gonna go cut myself with a butter knife and ketchup.