With Concierge Class will give you some nice added amenities that you won't receive in a regular balcony cabin (Cat 2X). If the prices are close I would go with the CC cabin.
Here is a list of the amenities you receive in Concierge Class:
•Welcome sparkling wines
•Daily fruit selection
•Daily hors d'oeuvres
•Menu of pillows - Conformance, Body, Goose, and Isotonic®
•Duvets and pillow-top mattresses
•Leather key holder, personalized stationery and a tote bag
•Double-thick Frette bathrobes•Hansgrohe® showerhead
•Early embarkation and debarkation
•Dining and seating preference
•Preference on shore excursions
The only thing missing is "The Concierge".
Take care and enjoy!
__________________ Cruisemates Community Leader/Moderator
"There is a great difference between being well traveled and just having been to many places." ~Me