What is the difference between USDC and USDC-E?

Could you please elaborate on the fundamental distinctions between USDC and USDC-E? I'm particularly interested in understanding their operational differences, if there are any regulatory considerations, and how investors might benefit from one over the other. Additionally, it would be helpful to know if there are any specific use cases or scenarios where one might be preferred. Could you also clarify any potential risks associated with each? Thank you for your assistance in clarifying these points.