The article indicates that the Cro-Magnons were snappy dressers, which enabled them to attract the Neanderthal debutantes, who unable to help themselves, caved-in to the suave new guys in town.
The article also refers to the Neanderthals being in rags, and the Cro-Magnons using plant fiber for sewing. This is sloppy writing and probably counter-factual. To have rags they would have needed fabric, which since spinning and weaving had not yet been invented is impossible. From what I have read of the American Indians, common sewing materials were sinew and strips of hide, although plant fibers are certainly possible in some areas.