There are only three species of dwarf cory that you're likely to see in shops;
Corydoras pygmaeus, the pygmy cory C. habrosus, the salt and pepper cory (I think this is where you're getting confused; it's why I hate common names!) C. hastatus, the dwarf or tail spot cory
Ah why didn't I think that may be what they were thinking! D: I always thought those were considered pygmy cories and then the..panda I think was dwarf. So I probably shouldn't have responded anyways as I'm confused myself