Which is safer USDT or USDC?

Could you please clarify which stablecoin is safer, USDT or USDC? As a professional in the field of cryptocurrency and finance, I'm interested in understanding the nuances of their respective security measures. USDT, being the largest in trading volume, has certainly gained widespread adoption. However, its transparency and regulatory concerns have often been topics of debate. On the other hand, USDC seems to enjoy a reputation for stricter compliance and regulatory oversight, backed by renowned financial entities. Could you elaborate on the key differences in their security mechanisms and how they impact the safety of investors' funds? Thank you for your insights.