This article covers what it means when two similar trains have multiple route numbers and how to book your trip.
You can find a Viewliner roomette on Amtrak's eastern route trains. Although similar to Superliners, these roomettes are slightly different.
Amtrak's Hiawatha transports passengers between Milwaukee, WI, and Chicago, IL, with three intermediate stops as well, including the Milwaukee Airport.
Amtrak's Acela runs along the Northeast Corridor and is Amtrak's high-speed train offering speed and comfort.