No difference and it’s actually better than other building solutions. Webflow forces, or makes it easy for you to give the right tags to html5 elements, to properly add metadatas to pages and site etc…
Recently we saw that all webflow sites have passed the google mobility test.
It’s a tedious work to have all the SEO details done and right. WF does that for us mostly so it’s pretty safe to say there’s a possibility that our sites are better regarding SEO than they would be when built with another solution… Mines are, definitely.