I've used both at different times. In the past, we found the Bob Trailer worked best when we were on self contained camping tours. Before the trailer, my bike was pretty top heavy with the tent and sleeping bag on top of the rear rack. Now that we have the tandem, we will be using a two wheel trailer because our older Bob trailer's fork isn't wide enough for the Mocha. And because there are two of us, we have less pannier "space" making the trailer even more attractive.