I've traveled on both. The viewliner room is outstanding... but the small commode is ... well ... really really difficult to maneuver. Now, on the the Superliner H Room... beware of all the problems!
Problem 1 - Some of the coaches have battery operated fire alarms just outside the H room door. The batteries are never changed and the warning 'chirping' occurs frequently. When this happens I have called the conductor who says he can't touch it as it is a federal offense to remove the battery.,, and that if I removed the battery I would be arrested on a federal offense. I mean, so the battery is dead and the alarm keeps chirping and you need to live with it.
Pure stupidity!
Problem 2 - You are at the end of a bank of bathrooms... it gets smelly. Also when folks don't close the doors they slam back and forth as the train rolls along. So you hear all that noise until you go out and shut the door yourself.
Problem 3 - This is one of the hottest and stuffiest rooms on the train and there is no window to open. Something about the arrangement of the heating and cooling systems makes the room hotter than most others.
Problem 4 - Lots of people tend to gather and talk outside the bathrooms. More noise!
So beware of the Superliner H rooms!!!