The meanings are different and the instruments used are different. Learned from the search on Sohu.com.

1. Trilogy in music refers to a piece of music consisting of the first, middle and last parts. It is the most complete form among songs. Trio is a noun in the field of music and is one of the genres or performance forms of music. one.

2. A trilogy refers to a piece of music performed using the same instrument. A trio refers to a piece of music performed using three different instruments, or a song sung by three people.