There are obvious differences between rock and punk in terms of musical style, emotional expression, playing skills, and development time.

1. Music style: Rock music has complex melodies and slow rhythms, while punk music has simple melodies and repetitive rhythms.

2. Emotional expression: Rock music expresses negative emotions such as anger and sadness, while punk music tends to express rebellious and impetuous emotions.

3. Performance skills: Rock music is richer in performance skills, while punk music pays more attention to simple guitar and bass performance skills with large distortion.

4. Development time: Rock appeared before punk. Punk once belonged to the category of rock. Later, due to its growing musical influence, it gradually broke away from rock.

In general, rock and punk are significantly different in many aspects, which is why they each have unique charms.