What is the difference between a Manamadurai and a Madras ghatam?

Manamadurai ghatams, from Tamil Nadu's best-known ghatam-making centre, are the heaviest and thickest type. They need more finger force and give a sharp metallic ring that some players prefer. Ghatams from Chennai (Madras) and Bengaluru are lighter and thinner, and the Madras type is described as easier to play and better suited to beginners.