Hi. If we are speaking of fruits, "peel" is for oranges, apples, bananas, and other fruits you can easily get the skin off. "Rind" is for bigger fruits like melons, which normally have to be cut with a knife to get the skin off.

I believe rind is tougher, thicker, and harder to do than peel. Just think about their respective nouns: orange peels. pork rinds.