I, myself, was curious about the CCT as far as having coworkers of mine without Cisco experience using it to get their feet wet. It looks like it would be great for people looking to do some fieldwork on Cisco equipment without going through the whole certification process. However, I did not compare it to any of the exam topics for the CCST. I would imagine there is some overlap.
The most merciful thing in the world, is the inability of the human mind to correlate all its contents. - H.P. Lovecraft