Last I checked (a couple of months ago), DT had a WAY better workflow, and it's better integrated (as mentioned in another comment here).
Also as I've seen mentioned in other comments, it lacks local adjustment tools and/or anything remotely equivalent to the masks system in DT.
It does have some interesting tools, but comparing DT to RT feels like comparing Ps to GIMP... there's a fundamental capability in the workflow that you'll feel missing if coming from DT to RT.