CRT- there is just something special about eating in the castle. We do both each trip, and by far we prefer CRT both for food and atmosphere. To us, the tables at Akershus seem very close together and cramped, and it is hard to get a good angle for the princess pictures. Also, if you have to sit in the section right in front of the buffet, where we have been the last 2 times we have eaten there, you can expect to be constantly bumped by people going back and forth to the buffet. It actually got to be kind of a joke with us because it was my chair that kept getting knocked into by everyone and DH and DD thought it was hilarious.
Now, if Belle is your absolute favorite Princess, it might be worth doing Akershus instead because that is the only way you can meet her and get her autograph in her ballgown, outside of ETWB. Also, as we discovered on our last trip, if it is imperative that you get a photo with Belle in that dress, then Akershus is the one for you, because Photopass lost our whole session of ETWB photos, so we have none. I have heard of at least 2 other disers who have had the same thing happen on different dates and times than the date and time they lost ours.