What is the difference between a “nonce” and a “GUID”?

Question

This question here is about creating an authentication scheme. The accepted answer given by AviD states

Your use of a cryptographic nonce is also impo

Answer 1

Nonces should be random (or at least non-guessable). GUIDs have quite a bit of non-randomness to them (I'm not sure how many bits of entropy are in a GUID).