Agreed with all. You can actually differentiate between Vanda and Rhynchostylis gigantea based on the leaves (unless it is a seedling). The root texture of Rhynchostylis gigantea is not as smooth as any other Vanda either. I also read somewhere that Rhynchostylis gigantea doesn't like the roots to be disturbed. Anything that has gigantea in its name are super slow grower.