We went in December and did dinner at CRT, dinner at 1900 and breakfast at Akershus. If we were to do any of them again, it would be Akershus. It has a more relaxed atmosphere and for us, it had the same princesses as CRT did. We enjoyed 1900, especially the stepsisters, but probably wouldn't do it again in the near future. As for CRT, the novelty of eating in the castle is cool and our girls like the wishing ceremony they do, but the food is not that great and it is pretty rushed.
So, if you can do Akershus, I would recommend that. However, if you have to pick between CRT and 1900, I would consider if you want to see princesses or just the Cinderella characters.
HTH!