USDT has more supported trading pairs and liquidity, particularly for crypto exchanges in Asia. It just seems more popular there for whatever reason.
If I had to choose USDC or USDT though, I'd rather hold funds in USDC. In general I'm not much of a fan of stablecoins though, but I do acknowledge the quick, 24/7 transfers they offer is interesting, as well as the high APRs for lending them. However, I'd still rather just hold fiat vs stablecoins. I find other cryptos to be much more compelling.
If I had to choose USDC or USDT though, I'd rather hold funds in USDC. In general I'm not much of a fan of stablecoins though, but I do acknowledge the quick, 24/7 transfers they offer is interesting, as well as the high APRs for lending them. However, I'd still rather just hold fiat vs stablecoins. I find other cryptos to be much more compelling.