So what is the difference between an Indian Torador and an Indian Camel gun The Rifle style or shoulder fired type) ? Is it only the Butt??

For a massive example of the Camel gun see
http://www.rockislandauction.com/viewitem/aid/55/lid/30
See below for a mixture of both types for comparison. The top picture has an odd man out in what looks like Brown Bess configuration.