The main difference, as pointed out earlier, is that a touring bike is designed to carry much heavier loads (and carry them differently). As a result, it's not going to be as light. Bicycle touring is a much more leisurely pursuit with a different level of self-sufficiency. The two types of bikes are quite distinct, though this may not be apparent at first glance. Many of the bikes built for the technical trials are, of course, one-offs that represent extremes in an attempt to win a prize, rather than eveyrday examples. There are of course similarities, but in the end, they're very purpose-built and designed bikes - as usual, the devil (and the difference) is in the details.