A roller is for daily, gentle work; a gua sha stone is for deeper, more sculpting strokes. A roller glides over the skin, which makes it the easy choice for morning de-puffing, for beginners, and for skin that reacts to pressure. A gua sha stone has a contoured edge that follows the bone structure of your face, so it lets you work more slowly along the jaw, cheekbones and brow. Many women use both: the roller in the morning to wake the face up, the stone at night to release tension.