We were in 862 last year on WINE and loved it. We decided on the B category because we liked the layout a little better than the standard cabins (although we've been in a standard cabin and they are very nice). The Butler was just icing on the cake, we didn't book for that. Our cabin was great and we have booked a B, 861 for CROSS next year, again because we like the layout better. Our particular Butler was over and above, and did many extra things for us - totally lint brushed Frank's black pants one night, did a great job setting up a cocktail party we had, etc. However, be careful on the Voyager, there is an aft vibration that has been discussed many times on this board, so if you are doing and A or B, and looking towards the aft, try not to go more than two or three cabins from the lobby. As to the differences between A and B, there are none other than deck. We liked deck 8, and would be fine on deck 7. Others like deck 10 and as dougburns said, you do have to be careful about the locations under the pool deck.