The Webster Dictionary defines “variant” as
one that exhibits variation from a type or norm
And, it states that “variation” means
something that is similar to something else but different in some way
As a comic book collector, variants aren’t just an expensive single issue. It’s a way to follow your favorite artist. From personal experience, anything J. Scott Campbell draws, I’m going to try to purchase it. I’ve followed him from his days drawing Danger Girl to penciling covers of various Marvel issues including The Superior Spider-Man and The Amazing Spider-Man double-spread and some one shots like John Carter of Mars and Thor.