While I love the whistle 4449 has on her now due to the work they did on it between 2012 and 2015, this whistle is a very close second and it would be great if they could find one like it to put back on her someday, even just for a special occasion.
I was surprised you did not hardly show any shots of the S P & S 700. If anything that is a BNSF heritage locomotive and it is the same 4-8-4 Northern like the 4449.