Which one is the best organic traffic or Adwords traffic?

Which one is the best organic traffic or Adwords traffic?
They are all good and non is cheap. Organic traffics require hard works and patient, in some cases (depending on the competitors' activities) you may not get results, or it takes time to come. But when the traffic comes, it will continue and lasts for a long time.

Adword's traffics can come quick, and you can start making sales immediately if you know what you're doing. it just that you need to continue spending, i.e., paying for the traffics.