Does black cod taste different than regular cod?

I'm curious, have you ever tasted both black cod and regular cod side by side? I'm wondering if there's a noticeable difference in their flavors. Some people say that black cod has a richer, buttery taste, while regular cod is more delicate and mild. But I've also heard that it depends on the cooking method and the seasoning used. So, I'm wondering, based on your experience, does black cod really taste different than regular cod, or is it just a matter of perception?