ERC-721 vs Non-Fungible

A technical standard for non-fungible tokens (NFTs) on Ethereum that enables unique, individually distinguishable digital assets where each token possesses distinct characteristics and cannot be exchanged on a one-to-one basis like fungible currencies.

A property of assets where individual units are unique, distinguishable, and non-interchangeable, making each item possess distinct characteristics and value that cannot be exchanged on a one-to-one basis with other units.