Consider Catalog as a book containing a list of things that you can buy, use, etc., and often pictures.
You have lots of products that is hard to present? Use Catalog!
Bring your companies catalog with you in meetings and see the difference.
Visual Identity is everything related to your business which can be visualized to represent your brand.
Visual identity for your business is just like clothing for your body. It represent you & make impact on your character before you speak.