I’ve probably owned 8 different Clams, if not a couple more. I can honestly say I like the quality of the Otter much better. The Otters feel much more sturdy than any of the Clams I’ve had. Also, the Otters are easier to assemble. Granted you’re probably only going to do this one time. The only negative thing I’ve found about the Otter is the lack of accessories, but honestly you can buy other branded accessories and they may work, or just some stuff from Amazon like you spoke about.