The interiors should be as they are in the pic's. The first class seating arrangement is where the 4 windows are spaced further apart. It has 2+1 seating, 8 tables, with double seating on one side and single seating on the opposite side. The Standard set up where there are 3 windows has 2+2, seating, 6 tables with double seating on both sides. There are 48 seats in all. The standard models also have the toilet modeled.
There were some pre production pics of the MK11 aircons (including the composite) on the MM website some years ago. I can't remember if there was a first class.
Rich,