What’s the difference between MAPP gas and propane or butane?

MAPP (AKA MAP-Pro) gas burns at a higher temperature than butane and propane. Your choice between the three depends on what you’re using the torch for. Butane is clean burning and great for small jobs like soldering electronics. Propane is the next step up and can be used for tasks like loosening rusted bolts. MAP-Pro is used for the more robust jobs like soldering copper pipes and heat treating knives.