Attitude is more expensive simply because they have a higher mark up. People pay higher prices though because The Attitude supplies us with top notch service, shipping, and overall customer experience.
If you want to save a few bucks go to nirvana, but there they have more reports of problems then the attitude. By no means am I saying one is better then the other, because if you want better service you're going to have to pay for it.
This is also only in my experience! So if your opinion differs, I don't really care
But, I'm sure many people with agree with me.