Comparing soldering tips and fuels

I am between 2 different materials of soldering tips and fuels.
Rather than asking if one is better than the other, can anyone give
me feedback of the pros and cons of these items? First, the +'s and
-'s of steel soldering tips vs copper?

Second, the +'s and - 's of MAPP fuel, acetylene, and propane fuels.

thanks!
brenda