@samsonite18654 , The biggest difference is the crowdfunding campaign you can launch for your book. Steemit articles are great however, if you have a 300 page book it might be difficult to publish on the Steemit platform. If you publish it to Publica, you can raise money for it through a book ICO, where the community can support your work and buy your book - meaning you get paid immediately per copy sold. I would say that is one of the biggest differences. I'm not sure if Steemit has campaigns for funding books. With Publica, if you have an idea for a book, people can support your idea and donate to pay you to hire an editor, illlustrator or even yourself as an author to write it.