Who is better, Xiao Jiu the cat or Zilan?

There is no comparability between the two.

Xiao Jiu, the cat, is a virtual character, while Zilan is a plant.

Xiao Jiu the Cat is the hero in The Rise of Cats. He is a cat boy with a musket and a dragon garden gun. He is tough, gentle, kind and affectionate.

Eupatorium adenophorum is a perennial herbaceous bulbous plant with purplish red color, so it is called Eupatorium adenophorum. Its flowers are beautiful and suitable for viewing.