What is the difference between a refurbished iPhone 13 Pro Max and a new iPhone 13 Pro Max?

The main difference is that a refurbished iPhone 13 Pro Max has been previously used and may have minor signs of use, while a new iPhone 13 Pro Max is brand new and comes straight from the factory. However, refurbished iPhones are offered at a lower price and are more environmentally friendly, while offering the same functionality and performance as new iPhones.