World have many kinds of flexible cams. For example; CCH alien, BD Z4, BD x4, WC zero, DMM dragonfly, Totem cam, original totem, Metolius master cam, TRANGO flex cam(It doesn't sound like a name) like those. Also I have z4, totem, alien revos, And, There is definitely a difference between them. I don’t know really there’s rankings so,I wanna know what is better or what is worse. So, leave replies and make a comparison please. Thanks!