As much as I mistrust USDT, they have more trading pairs and a lot more liquidity than the BUSD. That makes it more practicable for trading
Because BUSD is more focused on its own trading platform. But just as you, I also don't trust that much USDT although both are centralized but we got plenty of choices for stable coins if ever we wanted to put our money parked on it.
But as a choice, BUSD would be mine.