That is pretty much correct.I'm no expert but this is how I understand it from all the reading I've done here over the last few weeks. The lower ohm is for higher wattage, burns hotter, uses more juice and is best suited for DL. The higher ohm is for lower wattage, doesn't burn quite as hot and is more suited for MTL. It's all personal preference, of course, and how you like to vape but that's the gist of it, I think.
Please, someone correct me if I'm wrong!
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This^. Numbers are meaningless if you don't understand what those numbers represent.The lower Ohm coils are made of thicker wire.