What is a practical difference between a loop and recursion

Question

I am currently working in PHP, so this example will be in PHP, but the question applies to multiple languages.

I am working on this project with a fiend of mine, and as

Answer 1

A loop will be faster because there's always overhead in executing an extra function call.

A problem with learning about recursion is a lot of the examples given (say, factorials) are bad examples of using recursion.

Where possible, stick with a loop unless you need to do something different. A good example of using recursion is looping over each node in a Tree with multiple levels of child nodes.