"It is hard to compare a passenger train with a freight train, entirely different beasts." Hm, for me they are quite simimlar. Just one was build to be more si

"It is hard to compare a passenger train with a freight train, entirely different beasts." Hm, for me they are quite simimlar. Just one was build to be more silent mainly for passenger comfort (it is inded nicer in the modern silent ones) and the other for most weight. But you could optimize freight trains for silence as well. All the loud metal scratching noises for example are avoidable, even with more weight. The ones I am talking about were just not build with noise in mind.