If you look at any Dream deck plan prior to 10/18/11, the rooms with the "metal wall" verandahs were all Category 6A and 6B. I put the metal wall part in quotes, since on the dream, that metal wall is only about shin high, and the rest of the verandah wall is railings and plexiglass.
The 10/18/11 date is significant since on that date, some of the 6A and 6B rooms with extended size verandahs were upgraded while some of the more obstructed view verandahs were downgraded, so it's not quite cut and dry any more.