How can a user tell the difference between a WhatsApp Business and a WhatsApp Business API-setup?

How can a user tell the difference between a WhatsApp Business and a WhatsApp Business API-setup?

WhatsApp does not have many differentiators to distinguish a WhatsApp Business API-integration from a WhatsApp Business client so it is difficult for a user to find out that the integration is with the WhatsApp Business API.
The only visual way to tell the difference is the green tick sign for an Official Business Account.