What's the difference between wstETH and stETH?

Could you please explain the distinction between wstETH and stETH? I'm trying to understand the nuances between these two crypto assets. Could you elaborate on their respective functionalities, uses, and how they might differ in terms of risk and reward potential? Also, I'm curious about the underlying mechanisms that govern each of them and how they fit into the broader cryptocurrency ecosystem. Could you provide some insights into these aspects as well? Thank you in advance for your clarification.