When I watched the video of Scott Mann at the factory in China the T motor sound was that of a diesel locomotive both the diesel engine sound and the diesel horn.
It would have better if Lionel had supplied the sound board with the S motor sound that Lionel had used on their two S motors models. Two of my friends who also purchased the T motor plan to purchase a sound board with the correct whistle sound.
Otherwise both of the T motors models look real nice. Plan to unpack mine tomorrow.