For the most part yes. JWT is a part of JOSE. For most things CBOR, think binary JSON.

I love me some CBOR, but Carl isn’t very adventurous in deviating from JSON (rightfully!) so I don’t expect a lot new in COSE if you have worked with JOSE.

Other than the tagged data types, the main inconpatibiiiry in CBOR to JSON is that CBOR map keys can be integers and in JSON must be strings.