Dr. Dre featuring Xzibit: What's the Difference

"What's the difference between me and you? About 5 bank accounts, 3 ounces and 2 vehicles"

What is the difference between me and you? Are we-all of us humans-really that different from each other? Do these differences group in material things like bank accounts and vehicles? This could in turn affect how we live out lives. Would we all be so freaking, boring, plain-old-the-same if everyone had the same amount of concrete possesions?
Or do our differences come from who we are inside? So-and-so is the most faithful of the guys I know, but whats-his-name knows what respect is. Is who we are so important? Can we control who we are?