Like I said, it's supposed to be a little "safer" of a gas. It's also supposed to be a little cheaper. Mapp VS Propane, not much difference at all. Couple degrees hotter. Not really any "benefit" at all AFAIC. I've used all the gasses. Propane, Mapp, Acetylene torches. I'll keep my acetylene. It's way hotter of a fire.
If your really curious, google it.
Here's a link that has a temp chart:
http://www.engineeringtoolbox.com/fl...ses-d_422.html
**NOTE: the temps are in Celsius**