One notable fact of green gas versus propane that I'm surprised no one mentioned is the safety factor. Green gas cylinders don't have any relief valves so there have been cases where they've been left in the back of a truck or similar on a hot sunny day and actually exploded.
Sure green gas is slightly more convenient since you don't have to add your own silicone oil or buy a propane adapter, but it's far too much more for that convenience and is unsafe to boot.
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