I like Atlanta's burbs way better than Charlotte's.
The houses are much nicer.
The geography is better since it's much hillier.
The weather is better since it's usually five to ten degrees warmer on any given winter day.
Atl also is more international, has WAY better international air service, and MUCH better shopping for whatever that's worth.
That being said, Charlotte is a much better city in my opinion. I like Atlanta, but for a metro of its size, Atlanta pales in comparison to other new cities like Seattle, Dallas, and Houston.
Charlotte's downtown seems to have learned from Atlanta's mistakes and is becoming denser and more urban.