There's commercialized hip-hop that basically promotes material/meaningless songs/catchy phrases/ABC's lyrics you hear through the radio & gets put out by the Clear Channel, who have bought out 1,240 radio stations in 2005, which is 31 times the amount of the maximum amount a company was allowed to own in 1996 due to the Telecommuncations Act(only allowed a co. to own a max of 40 stations). And then there is more real hip-hop that has artists with meanings behind there words, maybe a story to tell, with an influence of art. So yeah that is the difference between real & mainstream/product of the system music. that's just some knowledge
& Oro kick rocks child