vallawyer, you are not the only one confused! It has been rather difficult to keep up and try to keep it sorted.

ESM, YT International, and Kondor models are all the same product, I think. I think ESM is the actual manufacturer, and the factory is in China.

VQ Models are not the same in any way shape or form. They are a manufacturer that is in Vietnam. Along with Black Horse, and not sure but I think Seagull, and Phoenix models.

VQ Warbirds is a business name. That business sells VQ Models from Vietnam, as well as ESM models from China. They do not manufacture any model airplanes.