From the Mario Wiki:
"Daisy is well known to be a tomboy by reason of her extroverted personality and tough demeanor. She can be described as energetic, cheerful, and confident. She also has a sassy side, often regarded for her wittiness and attitude. Daisy tends to stand with her hands on her hips, and is prone to air-kisses and showboating during victory celebrations. She has a strong competitive drive, too. In the face-of-defeat she has exhibited hotheadedness, and has shown-off to get her way."
And to be honest, I don't understand why people think that Daisy would just be a clone. Daisy is unique enough to have her own moveset.