I went with the Zeons and my brother has the AT3s on his gmc 1500. We both played off road and have compared on multiple conditions. The sound and performance is very similar. Perform about the same on wet road surfaces. The zeons seem to corner better and have a little less sidewall roll when pushed hard on dry pavement, but I think the AT3s were a little better in the mud. Both are great in the sand and in the snow. I also went with the stock tire size and am happy I went with the zeon a because I like to be able to push the truck more on dry and still have the aggressive AT look.
Hope this helps you in your upcoming purchase!!!