They are both incredible devices, offering you plenty of value for the money you spend on each of them. The Shark Professional Steam Pocket Mop does not feature a removable water tank, for one, and comes only with a year warranty. Both the Bissell and the Shark steam mops heat the water in about 30 seconds, but the Shark is harder to find on the market and boasts fewer features. So if you do have to choose between them, we would recommend the Bissell PowerFresh Steam Mop.