I expect that the Solo-Stove and the original version Bush-Baby (Bush-Buddy? I can't remember the name) would be more efficient and probably hotter burning than the folding/take-apart wood stoves. But the folding/take-apart stoves would win out in packability due to their small size when disassembled.

I bought the stove I did not because it was the lightest, or the most efficient, or the cheapest - I bought it just because I wanted it (not "needed" it). Just like we put skylights in our house when we built it. Those are not as efficient as a solid roof, but we wanted them anyway. There's just something neat about a small wood burning stove that makes me like them. And I like elegant mechanical designs, like the fold-up one I bought.