They are also on the same same label. Definitive Jux has some quality product.

If you're looking for expansive vocabularies you should consider exploring other dorky rappers like Scroobius Pip.

I think I remember reading Aesop say Del influenced him a great deal. If you like Aesop, check out El-P, Cannibal Ox, Illogic, and basically anyone who was associated with Def-Jux.