There is a noticeable difference taking the Maple Leaf or Empire Service train eastbound rather than westbound.
Eastbound, the service originates in Toronto or Niagara Falls, and the trains are clean when you board.
Westbound, the trains originate in New York City, and by the time you board in Central New York, the New Yorkers who have disembarked have left bottles, wrappers, newspapers, and other detritus EVERYWHERE. I realize that they live in a debris-filled nightmare, but must they recreate that effect everywhere they go?