Hi Joel,
Both are in the benzo family. I have been on both. The klonopin stays longer in your system than Xanax does. The only difference I found was, it takes about an hour to take effect, where Xanax you feel the effects in about 15-20 mins, but doesnt last near as long. As long as you take it as directed, you wont feel a change it the way it relieves the anxiety, but you will notice that it lasts twice as long in your system than the Xanax.
Hope this helps.
Trish