Not really, at least not in the sense that airlines have Coach and First Class with different services for each. Everything available on a cruise ship is open to every passenger. The only real differences come in the size of cabins and that is simply based on what you want and can afford. The other place you find a difference is the perks for members of the loyalty programs and repeat cruisers. There are typically cocktail parties for return cruisers and loyalty program members might get a commemorative pin and free laundry or free Internet access.