Although I greatly prefer Radisson, I do have to say that the following features on Crystal struck me as significant advantages over Radisson.

1. Crystal's casino is MUCH better. It's run by Caesar's and is actually a comparable gambling experience to what you'd get in Las Vegas. There is a full-size craps table and at least 1 mini-baccarat table (there might be 2 but I don't remember). Radisson's casinos are kind of small and tepid. Radisson passengers don't seem to be as into gambling as the ones on Crystal.

2. Speed of internet connection seems better on Crystal. It's significantly more expensive on Crystal, but they seem to have more bandwidth or something. I know it wasn't a function of being near the earth's elongation which would put the ship off track from the satellites. Again, if you don't really work while on vacation, this is probably not a huge advantage.

3. Alternative restaurants on Crystal are of higher quality. Prego is quite good; the executive chef is Piero Selvaggio, who runs Valentino in LA. The Japanese restaurants (Kyoto on Harmony, and The Sushi Bar on Serenity) are run by Nobu Matsuhisa. Jade Garden on the Symphony is based on Wolfgang Puck's Chinois. I happen to prefer these cuisines and the recipes designed by these chefs to traditional French cuisine. So it's really a matter of personal preference. I won't say too much about Radisson's specialty restaurants other than that I will never eat at Signatures again on either Voyager or Mariner. In addition, I have yet to see a Latitudes menu that looked remotely interesting (on either Mariner or Voyager). Of course this is all personal preference since my sister's favorite Radisson restaurant is Latitudes, and she's arguably pickier than I am.

However, I did think that Compass Rose was better on average than the Crystal Dining Room.

Honestly, the Crystal deal breakers for me are fixed seating at dinner, no coordinated LCT travel groups, and overly formal service that borders on obsequiousness.