I've only heard the Audison so can't compare but the Audison was simply amazing. It took car audio to an entire new level of listening.
FWIW, the shop I was talking about that installs the Audison uses Kenwood head units. A friend of mine had them do a car with Clarion Pro and Dynaudio that I was very impressed with. From what I understand when using the Audison the head unit isn't overly critical, as long as it's a quality unit, so it may come down to which one has the features you like and looks best in your car.