Both stablecoins, but different blockchains
USDC US Dollar Coin
USDT also called Tether
USDT does not have its own blockchain, but uses the infrastructure of several other networks, making it one of the most versatile assets in the industry. The obvious advantage of using USDT for payment purposes is the stability of its value.
Both stablecoins, but different blockchains
USDC US Dollar Coin
USDT also called Tether
https://www.moonpay.com/learn/cryptocurrency/what-is-the-difference-between-usdt-and-usdc