Not mentioned on that page is the superior layout of the upstairs toilet in the Superliner I sleeper. It has twice as much floor space as a standard Superliner toilet, and also has a window.

Also not mentioned, the number boards on Superliner II cars (both those next to the exterior doors, and those just inside the end doors) are electronic digital types, whereas on Superliner I they are "analogue."

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Sing to the tune of Humoresque:
Passengers will please refrain,
From flushing toilets while the train,
Is standing in the station,
I love you.

And here is one from a Superliner II. You can't read it too well from this angle, but its the illuminated rectangle at the extreme right of the photo.

The first two digits are the train number (In the case of the photo above, that was train 6, the eastbound California Zephyr.)

The second two digits are the car number. I don't know about other trains, but on the Coast Starlight they are numbered from the diner outward. So, for example, sleepers forward of the diner on the northbound train are are 1430, 1431, 1432. Coaches on the Starlight are numbered 1411, 1412, etc. So when you walk from car to car it helps to remember your car number so you don't accidently walk into the right room in the wrong car.

Your ticket will have your car and room number somewhere on it. It reads something like "02/1431" meaning you have room 2 in car 1431.

You also need to know your car and room numbers when you sign for your meals in the diner.

------------------
Sing to the tune of Humoresque:
Passengers will please refrain,
From flushing toilets while the train,
Is standing in the station,
I love you.