The butler's job is to take care of all of your needs and requests within your suite except for cleaning which is done by a cabin steward. The butler will help you unpack and pack your luggage, keep your suite stocked with beverages, deliver food and beverage orders, serve you breakfast, lunch & dinner if you prefer to have it in your room, etc.
The concierge will make specialty restaurant reservations, book shore excursions, provide reserved seating in the theater, and provide information of all onboard activities.
Refer to the following link for more info.
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Here is the (working) link to the perks and features of the penthouses on the ship
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