CADORS is the Canadian aviation daily occurrence reporting system. Let's say I take off out of Calgary and I mis-fly the standard instrument departure. The tower controller will submit a report, and it's called a CADORS.
The other one is a CAIRS report. In the SMS system, if I have a safety concern, I go to my employer, I submit a report, and I'm not happy with the outcome of that report, then I can submit a CAIRS report. I believe that goes to the TSB, who handles that report and follows through with it.
That's the difference between CAIRS and CADORS.