Just a word on single level versus double level trains (generic equipment model called Superliners--such as you saw on the CZ) ). "Taller" trains are an "out-west" railroad tradition, due to tunnel clearances in the east(tunnels built much smaller and much longer ago than were built later in the wide open spaces).
A train like the Crescent and, say, the trains from New York to Florida have to be single level due to tunnel problems in New York, and maybe another place or two as well, not sure. Years ago, before Amtrak, whcih began in 1971, there were also tunnel problems in Washington,D.C and even, before that, in Jacksonville, for example. But that has changed.
Today, under Amtrak, there are some high level trains back east where possible, such as the Auto Train from Lorton, Va. to Orlando, and the Capital Limited from Washington to Chicago.
In the past there were not so many high level trains but some of the better trains back mostly before Amtrak had what were called "dome" cars(sort of a camel hump protrusion in the middle of the car for sightseeing). Domes rarely made it back east, again, because of tunnel clearance problems, which were even more restrictive then.
I am sure this is A LOT MORE about the subject than you care to know, but if you are accustomed to superliner (hi-level) trains, this one level train just might be a little bit of a shock. Don't worry. It will get you there. Enjoy your trip. You will get used to it. Single level trains used to be the norm all across the country. Before Amtrak came out with the full lenght superliner style equipment there was not much else like that except on one old time railroad, the Santa Fe, and some commuter lines (to economize on space, not for scenery so much). .