One of the features of new Legacy tech (engines cataloged in the 2020 Big Book and beyond), is the option of multiple whistles/horns.
The VL GS Series of engines will have 3 whistles and 2 air horns. You'll be able to switch through them using the Aux1 button or using the LC APP. The bell will also have 5 different pitch levels to choose from. The engine will retain which whistle/horn/bell you choose through power cycles.
And yes, the default whistle will be correct this go around. Hard to misidentify the 4449's whistle.