A student titrates a \(25.0\text{ mL}\) sample of \(0.10\text{ M}\ \text{NH}_3\text{(aq)}\) with \(0.10\text{ M}\ \text{HCl(aq)}\) at \(25\ ^\circ\text{C}\). In a separate trial under identical conditions, the student titrates a \(25.0\text{ mL}\) sample of \(0.10\text{ M}\ \text{NaOH(aq)}\) with the same \(0.10\text{ M}\ \text{HCl(aq)}\) solution. Which of the following correctly predicts and explains the differences observed in the \(\text{NH}_3\text{(aq)}\) titration curve compared to the \(\text{NaOH(aq)}\) titration curve?