Portholes of the 1908 D design?

[Aurélien WOLFF]

Hello, how different are the portholes of the 1908 D design, I ask because I'm tempted to do it using a Titanic model. I'm guessing it's quite different from the real ships since the cabins didn't had the corridors with portholes.

source: Original General Arrangement plan (1908) - rms-titanic-artwork.com
Thanks for your answers!