I think it depends what you want. Diffs are better if you want to review changes and intelligently merge them. CDRT is better if you want there to be just one

I think it depends what you want. Diffs are better if you want to review changes and intelligently merge them. CDRT is better if you want there to be just one document that everyone is editing at the same time, with merging being an automatic process and the rare non-sensical merge being acceptable.