Quadro cards have special drivers that outputs more fps when using solidworks.
With few parts it's easy to any card to handle. But if u get into some heavy assemblies, u gonna cry if u using some standard geforce/amd card (I did it, LOL)
So quadro cards don't have special hardware (but is more tested than the regular), but do have special drivers.
So yes, they costs more basically cause of the good CAD/CAE drivers.