I don't think it is debatable that Em had a higher talent, but over all consistency I think Nas is better.
The last few years Nas has been WAY better. Life is good crushes Recovery. And even this year Nas has been fire.
"I ain't mad at you, young king, this unsung song is haunting. "
"And who could I ask for help? Older niggas was gettin' mad
But that's the gift and the curse, that's the good and the bad
At least you got Jay, but he already one of the greats
And it's hard for the great to tell somebody how to be great
Nigga I tried and niggas threw that shit right back in my face
They took my cosign, but they ain't let me EP their tapes"
Em and Nas are my 1 and 2. I just go back and forth on what order to put them in.
Encore, Recovery, Infinite......Nas has never made albums like that. That's why it makes it hard.
At the same time Nas has never made anything as good as the Eminem Show.
Nas has more releases and more consistant. Also he didn't have Dr. Dre, one of the best producers all time holding his hand through becoming famous and producing his stuff.