I have been thinking the same actually. Maybe its because less goodies get lost in unnecessary cooking(between the hits on the solo)? Its not a big difference imo, but enough to notice. Considering I can use abv from my lb's another time in the solo for emergencies, I would say the box at least get me as high on less goods. I got my new walnut box a couple of days ago and man it get hotter a lot faster than my old dirty box with the same batteries. Fresh logo batteries and a new box is very powerful! sadly I combusted on my second trench :/. Its so more easy to get big hits. I got a tiny water pipe that I think is a perfect match for the LB! I now get hits almost the size of my solo in 5-6 seconds and also drawing faster than with the old box. I love it! will be cleaning this new one more often. The draw whole on my new walnut box is a little to big. The stems is way to loose. The glass ones will fall out if I turn it upside down:/ Very annoying! At least I got an acrylic stem which is a little tighter fit. Is the wooden stems a tighter fit? I might buy a couple if they are!