MAC One Hit Matte Lip Mousse is a muted, medium-dark peachy brown with warm undertones and a semi-matte finish. It had semi-sheer color coverage in a single layer, which was buildable to semi-opaque coverage with a second layer.
The texture was lightweight, watery without being too wet, and had some of that airy, whipped quality of a true, mousse-like consistency would have. The color applied evenly but sank into my lip lines and emphasized them. It wore well for four and a half hours and felt non-drying.
MAC Beck and Call Matte Lip Mousse is a medium-dark plum with cooler undertones and a semi-matte finish. It had buildable pigmentation from semi-opaque (one layer) to opaque (two layers), and the only way to get sheerer coverage would be to wipe off excess prior to application or to dab on the center of the lips and use a fingertip to spread and diffuse the color.
The consistency was lightweight, spreadable, and felt like a watery mousse, a little airy but not as whipped, and the color applied evenly across my lips without emphasizing my lip lines noticeably. It stayed on well for six and a half hours and felt a touch drying over time.