Infinitely different experience; for the most part those Euro systems are high speed trains designed expressly to compete with domestic airlines in moving people from A to B in the fastest possible time. They are for the most part little more than souped-up commuter systems.
Canadian trains OTOH are not, with the exception of some of the commuter lines in the Montreal - Toronto - Ottawa triangle. Those trains aside, Canadian rail is geared instead to travellers both domestic and international who want to experience the historic atmosphere of the old "Canadian", or whatever they are calling its 21st century equivalent, and the spectacular views afforded by its famed dome cars which at the time were unique to Canadian trains. They want to see the Rockies, the Canadian prairies, the Canadian Shield and great lakes etc.
The last domestic train I was on was the Rocky Mountaineer which even more so caters to those rail buffs wanting to experience the romance of rail travel at that deliberately slower speed.
The existence of the RM is designed purposely for that reason and to attract those rail fans uninterested in riding a glorified bullet train. When I was on the RM virtually no one was glued to anything close to a laptop or tablet other than perhaps at night in the hotel; most passengers were far too busy during the day snapping pictures or taking video of the passing BC/Alberta/Rockies landscape. I can't recall the last time anywhere anytime that I saw so many DSLR cameras nor so many expensive long telephoto lens'. There is even a platform on the last car of all RM trains dedicated exclusively to camera aficionados so they can have uninterrupted time and easy access taking pics and making their videos.
I guess I have driven across the country too many times to want to take a slow train.