I made both of these kitties from the same pattern and using the same hook. The difference? The yarn... One was a 3 med weight and the other was a 4 med weight. They are both soo cute! Video and pattern link below.
Tutorial GATTINI amigurumi all'uncinetto - crochet little cats - facile - easy by Anerom89: https://youtu.be/T5Yih842j3Q