Stipple is the term used most often by paper makers for the surface texture with ridges that are more like mini mountain peaks. It is this sharp texture that describes the surface of photo papers more than matte . Tooth is the ability to trap inks under or in the valleys below the higher bumps which may be sharp as in stipple or flat as in rounded textured on matte papers. I think tooth is at a microscopic level as you can have tooth with a paper without any appearance of texture, whereas stipple is apparent to your eye.