What is the difference between Coarse Cheesecloth and Butter Muslin?

Coarse cheesecloth is generally used to for making hard cheese to drain large curds, line cheese molds, etc. Butter Muslin is a fine cheesecloth and is used to drain soft cheeses. Both Coarse Cheesecloth and Butter Muslin can be reused: rinse in COLD water after use and then wash in the washing machine. They can also both be boiled to sterilize.