Am just a bit curious as to how comes the a3 3.2 and the r32 mk5 don't make that infamous (fart) sound both dsg/s tronic but the a5 3.2 and the q5 3.2 does?

A5 3.2 stronic/dsg
https://www.youtube.com/watch?v=gmvbP4b3kn8

Q5 3.2 stronic/dsg
https://www.youtube.com/watch?v=YnRoiKs--t0