Looking to book my first Neptune Suite on N. Amsterdam. Is there any difference in the cabin size on decks 6 or 7? I see that the cabins on deck 7 are near the lounge. Also, I have a choice of aft cabins on decks 5, 6 or 7. Are these cabins larger inside or is the balcony huge? Trying to decide which one to pick. Any suggestions? Thanks.