MicroStation 16.1 pdf.pltcfg updated?

The defect resolution notes in the MicroStation 16.1 readme note that:

654753 Deliver new PDF.PLTCFG drivers for improved quality and performance settings

however when I compare the 16.1 pdf.pltcfg in the Default\pltcfg folder to the ORD 10.9 pdf.pltcfg in it's Default\pltcfg folder they are identical. Is this a code change only and the file itself was not changed?