illmatic changed the game as far as lyricism
but snoop album had a international impact , had old white people in nursery homes saying "rolling down the street , smoking smoking, sippin on gin and juice"
had presidents from other countries saying "with my mind on my money and my money on my mind"
my personal preference is nas, but i would be flat out hating by not saying snoop. nas shook the east up, snoop shook the world up.