Originally Posted by Styrak
Duster is definitely not the same as propane...
Okay it's weaker and has a chemical component (in some cans) that can eat the o-ring... but it's still a propane propellant.
But like others said, figure out a platform you like and find the best brand for that one. No point buying a budget GBBP and not liking it because of its size, function, kick (yes, the blowbacks vary depending on the material and brands), etc. and having to deal with buyer's remorse.