Divi has had global settings using variables, which is one of the things Elementor core has just caught up on, but the Divi Theme Builder model where you manage headers, footers etc. is still not as versatile or powerful as Elementor's Theme Builder features for headers, footers, page templates, single and archive views for posts types, taxonomies... not to mention differences in dynamic content.

But it's great to have them all improving and evolving, so we as developers/builders/designers have more options to fit our workflows and client requirements 😁