I have both as well and use my propane forge for 99% of what I do. It is easier, faster, and more controlled for someone without a lot of experience with a coal forge. As Don said, obtaining good smith quality coal at a reasonable cost is also an issue. Charcoal is definitely an option and has its own learning curve. Learning curve is less with propane. They all have their own inherent dangers, educate yourself well on the dangers as mistakes can very well be life altering or lethal.