Flamenco guitars are traditionally made with cypress backs and sides, along with a spruce top. In recent years, however, “flamenco negras” which feature rosewood for their backs and sides became more popular. The flamenco guitar is known for being light, fast, and percussive, with low sustain. Classical guitars, on the other hand, tend to be a bit heavier, more solidly built, and have a characteristic high sustain, which makes them perfect for their genre of music.