Dawson can do anything Kessler can times two, the only thing that is wrong with him is that his chin is somewhat questionable.
Right now i would take Kessler, a few more fights down the track if Kessler doesn't show much sign of improvement i would probably give Chad the edge. I am a fan of both guys and right now i think Kessler is the more complete fighter, Dawson is fluid and kinda awkward which would give Kessler big trouble but i think he lacks the work rate to pull it off at the moment. I would absolutely love to see this fight.