In the SD202 series, you'll find a great variety of different sounds, although ALL SD202 series share the same drivetrain components and use the same engine (which are even the very same parts used in the last SD200 series). On the SD202, it seems to be a question of noise dampening and technical wear that causes the different sounds. Even a D92 can do the "Voith whine" as heard in the video. The axles may sound different, too: Some of them have a rather hollow howling, like the SD200, others have the distinct spur-gear whine, like the one in OMSI.