Complex sentence: According to Xavier de Rosnay of Justice, "Audio, Video, Disco" is lighter than their first album; this album is like "daytime music" and is not as aggressive as the first one.
Split into simpler sentences: According to Xavier de Rosnay of Justice, "Audio, Video, Disco" is lighter than their first album. With the first album being darker, and this one being "daytime music", not as aggressive as the first one.