Its goes hard beyond the lyrics, what makes it stand out is the structure... Many rap Kats aren't up on structure, but Rappers such as 2Pac, Em, Bone,Talib Kweli (figures his moms is a College professor), Mos Def, just to name a few are big into structure poetry/rap. If you look at some of the lyrics on sheet you will see that it goes beyond just rhyming a few lines at the end of a sentence..
With a sophisticated structure you can spit bigger words and multi-syllable words with out it sounding fucked up. This increases your flexibility with lyrics while giving them freedom to expand their subjects and not rap about shit that fit in simple bars..
I can tell this guy Nino is one of the best poetic structured rapper out there.