I should also note some simillarities to both the Phantom Express and the Hurricane Express. The roundhouse in this scene from the Phantom Express(https://obscuretrainmovies.files.wordpress.com/2018/03/tpe058.jpg) looks identical to the roundhouse in this scene from the Hurricane Express(https://obscuretrainmovies.files.wordpress.com/2018/01/hur006.jpg).
Also, the locomotives in both films look similar to one another. I’ve also heard on this forum:http://cs.trains.com/mrr/f/88/t/43421.aspx that footage of a 4-10-2 was used.
And I also said that the closest whistle used in both films was a Southern Pacific 5-chime. Of course, keep in mind that any sound is different from a distance than up close. Not to mention the doppler effect.