dual potentiometer wired in parallel
Electrically yes they are. The ganged one can withstand a lot more power than the single, but that would not be an issue with the subsequent resistor values shown.

Mechanically though it would reduce wiper noise. That is, the effect of dead spots as the wiper moves across the resistor. Often heard as a LOUD crackle on audio systems as you adjust the volume. However, in parallel with 120K you would still see a significant voltage change when one or the other was on a dead spot.