In fact, these stablecoins are no different from each other, the essence is the same, but everyone has their own reputation, someone often blames Tether for the endless issue and many are not sure that the reserve is 1:1, nevertheless, the capitalization of USDT is the highest, as for me, the best USDC they have a license and every month the reserves in fiat are certified.
Technically, this coins are somehow different to each other in terms of creation, opinion etc but they are all backed by USD and use as Stablecoin.
As you said, the dishonesty of the USDT is what lead to the creation more USD backed stablecoin but if you look every at all the listed stablecoin they are not different from fiat currency.