While both USDC (USD Coin) and USDT (Tether) are stablecoins pegged to the US dollar, USDC is generally considered to be more transparent and regulated compared to USDT. USDC is issued by regulated financial institutions and undergoes regular audits to ensure that the coins in circulation are fully backed by US dollars. On the other hand, USDT has faced scrutiny regarding its reserves and transparency in the past. Ultimately, the stability of each coin may vary depending on factors such as market demand and overall market conditions.