The only other thing that could affect printing is the Printer driver. If these are different between the 2 workstations, or even have some different settings, then this also could potentially cause the printout to change.
If all the printer driver settings are the same, and all the DPI/display options are also the same, it doesn't follow that printout would differ from one workstation to the next. Do all check specs have the same problem, or just the 2 that you set up?