First time with K4 Starter Kit and need help about correct Ohm coil

Hello everyone, I am new here. I am satisfied with K4 Starter Kit but I have concern about whenever I should get 0.2 or 0.4 Ohm. The reason why I asked because 0.27 Ohm is pretty much strong which gives me too much vapor air. I only can do is control air flow to be less for now. I assume that 0.2 Ohm would be ideal for less vapor air? Let me know with your help and feedback. Many thanks.
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