Is TUSD the same as Usdt?

Excuse me, could you please clarify something for me? I've been hearing a lot about TUSD and USDT, and I'm a bit confused about the difference between them. Are they essentially the same thing, or are there significant distinctions? If they're not the same, what are the key differences I should be aware of? I'm trying to diversify my crypto portfolio and understand the nuances of each asset, so your insight would be greatly appreciated. Thank you in advance for taking the time to explain this to me.