Vibration Control

[El_Duderino]

Turntable has motor to drive the belt hence vibration is definitely there.

Exactly. There are no vibrations to dampen in an otherwise solid state system hence the absence of any audible improvement.  Looking at things from a scientific evidence perspective, the reason an earlier poster with high end equipment cannot hear a difference is simple: there is no difference to be heard and they are less susceptible to the placebo effect that these miracle pucks induce in certain listeners.