What is the difference between USDT and TUSD?

Might I inquire about the fundamental differences between USDT and TUSD? I understand they are both stablecoins pegged to the US dollar, but I'm curious about the nuances that distinguish them. Are they issued by different entities? Do they operate on different blockchain platforms? Also, how do their reserve mechanisms compare? I'm particularly interested in their transparency and audit processes, as well as any notable differences in market liquidity or adoption rates. Could you elaborate on these points, please?