I'd say that the main difference is that openwebui is not so focused on making the product "teams first". Yes, it has users, but access to data like documents uploaded for RAG are shared across all the users in the same workspace.

We are going in a direction where access to data is scoped with permissions. We do it via apps (same as "GPTs" in ChatGPT). As a user you upload documents to an app, and then have an advanced sharing system to control who has can access it.

We will be doubling down on making company documents and data accessible from the app, which we aren't sure it's a priority got Openwebui.

hope that answers your question!