Center, melody.

1. The centers of listening to Peking Opera and listening to concerts are different. Peking Opera is actor-centered and focuses on the actors' performances, including singing, chanting, and fighting. The musical is centered on music, and all the actors' performances are performed in music.

2. Listening to Peking Opera and listening to concerts have different melodies. Peking Opera music, especially the singing, is very characteristic and systematic. The melody of the concert was more elegant and low.