I have not been to Akershus, but I adore CRT. You start off in the castle foyer, where you meet Cinderella. Then you're escorted up a winding staircase past stained glass windows, and finally up into the dining room. And need I remind everyone that it's inside the castle? On the second floor, with an entire wall of stained glass windows to look out at Fantasyland through!
Children get wishing stars and magic wands for girls, swords for boys (although they can choose either if they wish). Princesses rotate throughout your meal, and every so often, there's a little show where an announcer tells the children to hold their wishing stars and wave their wands/swords and say bibbidi bobbidi boo. The whole restaurant sparkles and everyone gets to make a wish. I've seen Fairy Godmother during the show sometimes, but sometimes not.
I can't speak as to which princesses will be there, because it depends. Last time I went, Ariel and Jasmine were there, but Jasmine is apparently rare. Aurora and Snow are pretty much always there. Cinderella is always, always there. Rapunzel, Tiana, Pocahontas, and Mulan are never there.