Which is more stable, USDT or USDC?

Which of the two stablecoins, USDT or USDC, offers greater stability in the volatile world of cryptocurrency? I'm particularly interested in understanding the underlying mechanisms that each employs to maintain its pegged value. USDT, backed by Tether, claims to be fully collateralized by US dollars, while USDC, issued by a collaboration between Coinbase and Circle, also promises a one-to-one reserve with the US dollar. Could you elaborate on the differences in their stability mechanisms and how these mechanisms might affect investors' confidence in each coin? Additionally, how do market forces and liquidity play a role in determining the stability of these stablecoins? I'm keen to gain a deeper understanding of these factors to make informed decisions in my cryptocurrency investments.