What is the difference between USDC and USDC E?

Could you please elaborate on the distinctions between USDC and USDC E? I'm particularly interested in understanding the fundamental differences in terms of their functionality, usage, and the underlying technologies that they are built upon. Additionally, I would appreciate it if you could highlight any regulatory or compliance considerations that might differentiate the two. It would be helpful to gain a clearer picture of their respective advantages and disadvantages in the cryptocurrency and finance landscape. Thank you for your assistance in clarifying this matter.