There are so many wrong inputs here.
USDT is built on Ethereum, with smart contracts.
Not just Ethereun network, USDT is also built on several other networks, including OMNI, Trons, Binance smart chance (BSC), etc.
Bitcoin and USDT are different in their transaction speeds and fees. Bitcoin transaction are slow transaction and higher fees, USDT on the other hand are fast in transaction because of Ethereum network
Again, not true. The gas fee for USDT depends on what network you`re working with, and the network you used as an example here (Ethereum) requires a higher fee compared to bitcoin at the time I made my post.
I just checked my wallet, and to send my USDT, I need $7.47 worth of Eth to transact it, while the "high priority fee for Bitcoin is 13 sat/vB ~$0.94", and with this fee, your transaction should be able to get a confirmation in a short period of time.
It would be best if you learned something first before you started creating comparison threads.