RPM Airgap vs. non-Airgap?

It seems to me that the Airgap is the way to go for most cars that perform where I would like to be.

Here is my question: What is the real world difference in performance between the two on a street car?

I was speaking to a friend in a much milder climate and he said that his really does not atomize the fuel very well when cold. I could easily end up running my car at 30 degrees in the morning and 90 in the afternoon so I am concerned.

I'm just wondering if the advantage is worth the potential hassle.

Thanks, ROB