Yup. The acceleration into the second and third gear is very
distinct also ( piiiioooooooooooooooourrrrr ) but its much more
muted than that for buses and is more bass sounding.
I used to call those trains "farting trains". This is because just
before they stop, they always let off one loud psssssssss. However,
the award has to go to the new black kawasakis for the longest and
loudest hiss.
Also, the glass of the Siemens trains are branded, they are made by
glastroch of Switzerland. The month of fabrication is imprinted on
the glass as well.