Basically a designer zoa is a very expensive zoa. Now how many people did I just make mad?haha
designer zoa’s usually are ones that will stand out then any other zoa. You’re very bright colors mixed with other weird colors could be considered. Zoas with spots all around them that are other colors I would say count.
Zoa’s with weird patterns would be considered. I’m sure others will post pics of a plain and simple one and a high end one.
Some do tend to morph colors, through changes in light or nutrient levels in water. But mostly yes "designer" are brighter, more vividly colored and less common zoas.