If it's an Embassy it's an Embassy. If it's a Consulate it's a Consulate....BUT....If you want to always be right, Immigrant Visa Units are part of Consular Services. In many countries the IV unit is not only not in the Capital City but also not at the same location as the actual Consulate. Here are some examples. Guangzhou, Cuidad Juarez, Montreal, Frankfurt, Mumbai and on and on. Visa interviews are conducted by "Consular Officers".