An opamp has an output resistance of only 50 ohms to 75 ohms so it takes a lot of stray capacitance to reduce its high frequencies.
But here we have a transistor with an output resistance of 3000 ohms so a small amount of stray capacitance will cut its high frequencies.
A breadboard has more than a small amount of stray capacitance.
But here we have a transistor with an output resistance of 3000 ohms so a small amount of stray capacitance will cut its high frequencies.
A breadboard has more than a small amount of stray capacitance.