Thanks for the comment everyone. Yup, Isaac , i notice the slight difference between our pitchers.
Alien, the coarse clay look like the pic below though this was from another pot. I water it everyday usually in the late evening. Coarse clay has more space inbetween therefore well aerated. It retains moisture due to its porous properties. northiana's leaves are thicker and retian water for it to survive longer dry spell and can withstand 2-3 days without watering.
