We have been to both so I would think which one you go to would really depend on your plans for the day/evening. If you are at AK that day then you could go to the one at AK as it will be easier. If you are somewhere else and are wanting to make a night of it then there is more atmosphere at DTD and you can have a wander round the shops.
Also if you are not driving or staying on site might make one warier to get to than the other