The Differences Between Realtors and Real Estate Agents The main differences between real estate agents and realtors Definition 1. Real estate agents are licensed to represent both buyers and sellers of real estate in transactions. They help clients buy or sell property, and must adhere strict ethical and legal rules set by the state’s realty commission. 2. A realtor is an agent of real estate who is a member of National Association of Realtors. To become an agent, a person must join the NAR. This requires that the person agrees to abide by its strict code of conduct and ethics.