In another forum i found this post.
But a well known professor of e-cig tells me that in this order of atomizers holds up the best with a 6 volt. For what it is worth, this is how I would rate the atomizers I have used in order of most durable to least durable, 801, 510, 4081, 103, and 901.
Also, The Copper is suggested for use with the RN4081 atomizer. This atomizer is much more robust and can take some serious punishment. (During my prototype builds I had one stick on which fried the batteries, but I'm still using the same RN4081 today)