On a previous trip I thought I would have a better experience by paying more than double the price for a Deluxe Sleeper which is a room with only 2 beds instead of 4. This fuckin guy sleeping in the bottom bunk was the loudest fucking snorer of all time. I wanted to punch him in the mouth while he was sleeping.
I ended up deciding that the soft sleeper is the best for the value. I don't even think I noticed that high pitch rattling tbh lol. It was more of the bumpiness and swaying of the train that kept me awake.