I know that there are only a few that think Nas is better considering that this is an Eminem forum. But I'd like to at least talk about it because I'm bored and I think Nas is kind of underrated a little bit.
If I had to choose, I'd pick Em. But I think you can make a strong argument that Nas is better. He has 10 albums and not a bad one in there. Some are a lot better than others, but I could put any of them on right now and enjoy it. He never made a Infinite or Encore. He was like 19 when he made Illmatic, just a kid and it's fantastic.
Em can produce and if I had both their catalogs laid out in front of me, I could probably pic more quality Em songs, so I'd put Em on top.
But, man, it's close... Nas has been fire from 94 to now.
http://www.youtube.com/watch?v=ws3Ks0FGxYM 1994
http://www.youtube.com/watch?v=gRnh9gKJpJQ 2012
He went from amazing to Amazing.
So if anyone can argue Nas's case better than my Jameson induced self, that would be interesting.