Sorry, I thought I had responded to this a long time ago.
Carnival Spirit Class does have 6 "special" Port side cabins; Cat. 8I, Cat 8g and Cat. 8 E , that I know of. I have stayed in 8232. These have balcony's that are triple "length" of regular balconies and like others in their class are wider, too. noted on a deck plan with stripes. We had two chaise lounges, two teak like (they were resin) chairs and a small end table. When looking at the deck plan, the cabins to the Left of the elevator bank are designated Handicapped. These cabins are around the corner from the elevator banks so you do not hear any mechanical noise. The blank space next to the Right cabin, is an Ice Closet for the stewards. We never heard any noise from there either. Only once did we hear passenger noise late in the evening from the corridor as folks walked down the hall. Also, there are 3 additional cabins on the Starboard side, which have double long balconies. I just booked #6281 on the Pride. Cabin size was out the same as regular Balcony cabins.