A: Webstudio takes a better approach towards data - being data agnostic allows it to focus on integration part of working with headless CMSs and database services. Currently you can already fetch data from any database service.
Full CMS integrations willl be possible in april.

Relume is currently not copy-pasteable, but our goal is indeed to make it possible to copy/paste relume and most webflow elements as well.

We also have just launched a marketplace with a library of section components made by community member that will over time develop into a Relume alternative.