What is the difference between USDB and BUSD?

As a keen observer in the world of cryptocurrency and finance, I often find myself pondering over the subtle yet significant differences between various digital tokens. One such question that has piqued my curiosity is: What is the difference between USDB and BUSD? While both appear to be stablecoins pegged to the US dollar, are there any underlying distinctions in their mechanisms, issuance, or usage? Are they backed by similar assets or do they differ in their approach to maintaining stability? I'm particularly interested in understanding how these differences might impact investors' decisions in terms of liquidity, risk management, and long-term viability. Clarifying these points would be invaluable in helping me navigate the ever-evolving landscape of digital assets.