here we go, the first relevant post in the thread....
Overall I disagree... Rakim is hugely influential, and his style revolutionized rap. That is without a doubt. But Tupac was a better song writer, had more hits, sold more records, and has surpassed Rakim's influence b/c the new generation of rappers looks up to Tupac like Tupac's generation looked up to Rakim. It's just the way things go... they are both legends in hip hop, but anyone under 20 has no clue what Rakim was about because they were too young when he was important.
As an MC, Rakim is better. At the same time, Tupac purposely simplified his rhymes to reach a wider audience b/c that what he saw as the best tactic to teach his people. He didn't do it for record sales like Jay-Z. One can only imagine if Tupac did not have the same upbringing what kind of lyrical beast he would have become. His intelligence alone was enough to be on a Rakim-like level.
Peace.