That's a long list.

- RDX has a spec, so it can have compatible implementations. The result of a merge is specified to a bit. Automerge works the way Orion coded it (this time).

- There are equivalent text and binary formats, JDR and RDX.

- RDX palette of types is richer. Automerge is narrower than JSON.

- RDX can work in any commodity LSM db, natively, in the core (and it does).

- and so on...