Should I buy USDT or USDC?

I'm quite new to the cryptocurrency world and am currently exploring stablecoins. I've heard of USDT and USDC and am trying to decide which one to invest in. Could you please explain the key differences between the two? Also, which one do you think has more potential in terms of growth and stability? I'm looking for a safe and reliable option to hold my assets. Would you recommend diversifying by investing in both, or should I stick to one? Your advice would be greatly appreciated.