How does CRDT compare against websockets?

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concurrency

WebSockets

I'm planning to work on a web project that requires concurrency. I have past experience with websockets and would favour using it again, although I've learnt about xamp and jabber and might be willing to explore if they're more viable. I recently learnt about CRDT (from figma) and while, from my perspective, it conceptually addresses the same issues websockets do, I can't find any articles comparing both.

What I have tried:

It seems CRDT and its abstractions come out of the box with support for concurrent editing -- undo, redo -- while websockets is a high level protocol for bidirectional streaming of data strings. Is there anything else that can aid me in reaching a more informed decision on which would be more suitable for my task? What advantages does either have over its counterpart?