Just to clear things the Darton is NOT the same, check the website it has a new patient # on it. The top and bottom cam is the same, and to my knowledge no one other mfg has that. The Bow Tech cam is licensed through Darton, so is some of the PSE cams, Hoyt cams, and a lot of others. This set is different from the standard cam and 1/2 binary, that is why there is a new patient #.