Jadakiss and Nas are not even comparable
Lyrically, Nas took it to another level with "illmatic". He was the next step up from Rakim. Eminem was a Nas clone when he first stepped off. Mind you, the first time I heard him was on the Cali Kings mix tape vol.1. I had that track on repeat in my car for like a week. Had no idea he was...uh...caucasian.