Is any one of the colon cancer screening tests better than the others?

Yes: I believe that at this time the colonoscopy is the gold standard when performed by an experienced physician and in the appropriate clinical situation.

Depends: If there are symptoms such as bleeding, then colonoscopy is the best test because there is a high chance of finding something like a polyp that could be removed through the scope. As a screening test the other methods all have their benefits and a few drawbacks, but reasonable choices can be made on the basis of things like patient preference, previous test results, or family history.