If you were to say boil enough water for three people on the power pot you would get a charge but not completely full. For the biolite, it would take longer and a little bit of effort, but you would get a charge after 20 minutes or so. Again, it won't be completely full, but you will charge it.
Let's be honest though, who wouldn't be ok with using the power pot on top of the Slatworx sitting by a small fire backpacking? The same can be said about the biolite, contained campfire that can boil water, and charge your gear with a little time?