It causes a bit more wear on the master cylinder, but exactly the same as if you are driving.
The big issue is that using the pressure system, you eliminate the chance of pushing air into the brake system. Just solid fluid, so it has better results.
Chances are, you can pay for the lower service, and they will still use the same tool to do the job.
The only thing extra I can see is they might activate the ABS test feature while they are doing to the work, to flush out the fluid in that part of the circuit, for the extra cash. Just pumping the brakes doesn't get the fluid out of the ABS modulator on a lot of vehicles.