I've read that the First Class staterooms on A and D-decks were decorated in the same white panelling style, but were there any more subtle differences in how these cabins were styled?
The standard first class staterooms forward on A, B, C and
D-deck were all paneled in the same white painted mahogany paneling. The differences between
A-deck and
D-deck is that the standard staterooms on
A-deck that were out-board (A-1, A-3 A-7, A-11, A-17 A-21, A-25 A-29, A-33 and A-35 on the starboard side and A-2, A-4, A-8, A-12, A-16, A-20, A-24, A-28, A-32 and A-34) had brass Cot beds (they were also much smaller), while the outboard staterooms on D-deck (D-7, D-11, D-17, D-21, D-25, D-29, D-33 and D-37 on the starboard side and D-8, D-12, D-16, D-20, D-24, D-28, D-32 and D-36) had mahogany Cot beds.