Head-to-head comparisons of chair features, desk types and specific models. Popular chair comparisons are mesh vs cushioned seats , dynamic vs fixed recline , synchronized tilt vs tilt lock and casters for carpet vs hardwood . For desks, see standing desk vs sitting desk and the FlexiSpot E7 vs UPLIFT V2 model comparison. Also see recline lock vs no lock , task chair vs computer chair and trackball vs vertical mouse .