Here's a run down on the different cooking gasses:
Methane -- also known as natural gas -- has one carbon atom and four hydrogen atoms.
has three carbon atoms and eight hydrogen.
Butane has four carbon atoms and ten hydrogen.
Kerosene has around twelve carbon atoms and 26 hydrogen.
Each additional carbon atom in the fuel stores additional energy, so the larger, heavier fuels with more carbon atoms burn hotter and consume more oxygen
when they burn.
and butane are similar enough in size and energy that you can likely just tweak the air intakes on the burners a small amount to allow extra oxygen
in to the air/fuel mix. A correctly adjusted burner should have a nice blue flame with no yellows, reds, or oranges in it. (These colors mean the fuel is not being burned completely, and the flame is producing poisonous carbon monoxide gas.)