There is no difference for all stable coins as all of them backed up are priced exactly the same as Fiat.
For example, stable coins USDT, USDC, BUSD, TrueUSD, PAXOS are all the same and what distinguishes them is the blockchain only.
USDT is now using the blockchain from erc20, trc20, bep20, BUSD is also almost the same as the USDT blockchain and everything is the same for different prices, just the blockchain.