Good-Person
Captain Junkie
The actual functionality is pretty much teh same however you have room to put in your website and your email and all of that information so that people can easily link the two together.
I have never used it so I am not sure if Whatsapp uses the same advertising techniques as messenger does. In the messenger app, you can see ads of different brands alongside your chat list. This is a great advertising technique and I believe it works well. Does Whatsapp business app uses the same technique as messenger?