I dont have both. In fact I dont remember reading of Nokians in my many hours of research. But I don't think it matters really. I have the AT3s and could not be happier!!!
I will first say that I spent hours and ended up with a list of about 9, then narrowed it down to about 4. I then waited and over a couple weeks I tried to find people in person who had the tires on my list, looking everywhere I went. I was lucky enough to find a couple of them and talk to the owners and listened as they drove off, which helped me cross them off my list.Then I was down to 2 and when I remembered that the Coopers were made in the US, I pulled the trigger.
I got a set Cooper Discoverer AT3. They are much quieter than most, handle surprisingly well, have deeper tread than almost all their competition, made in the US, look cool but not overly aggressive and do great off-road. Oh and to top it all off they do alright in the mud. In the reviews I read by pro testers they said these were the only AT tires they tested that did an ok job in the mud. I can attest to the truth of this, except for the time I went through sloppy mud and then right into deep sand. The only time I was ever stuck.
They do still sell these and I can not recommend them more. I will say that I would rather have a set of 33s on 17s but since I still have my old 15x10 mags and had to get the 31.5" models, my tire shop had to order them. But it was worth the wait as they were even cheaper there than I could find them online and I got a lifetime, full replacement warranty for all 4 tires for something like $82! Beat that.
So, if you need a new set of A/Ts, get the Cooper Discoverer AT3 tires and waste no more time researching. And if if you have an America's Tire by you, get them there. You will be so happy you did.