If you like to lessen transaction fee and will be trading mostly on Binance or smartchain BUSD is the best choice, USDT is best when your trading on uniswap and other centralize exchangesl.
You should use binance based dexs to feel if what you say is still true or not. I hate using stable on DEX, BUSD uses only benefit services from Binance. My personalities are not so important because stable for me is not very volatile so that we can worry about fees or similar matters. All stable coins are to me the same, as if they were guaranteed a large amount of liquidity in the market.