What is the difference between a beaded liner and an overlap liner for above ground swimming pools?

A beaded liner will have a thick bead or lip of vinyl around the top of the liner. This bead will fit into a track which is made to receive the bead at the top edge of your pool. To replace it you simply pull out the old one an insert the new. There is a little more to it, but as far as the bead is concerned that is all you have to do with it. Overlap liners are harder to install because there is no bead so you don't know where the correct height is. You overlap the liner over the top edge of the swimming pool and clamp it in place with a piece of plastic. A beaded liner is harder to measure but easier to install and a over lapping liner is just the opposite because you are constantly adjusting the plastic clamps.