Question about WD Red Plus

When asked about the power consumption of the disk, someone replied "Sequential read/write 6.2 W " - according to the current data sheet (unfortunately the same is linked for old and new) it is only 5.7W. So presumably just minor optimisations, but they didn't justify a new serial number. Somewhat intransparent from the manufacturer, but good that Digitec differentiates at all and probably completely irrelevant in the application, unless power consumption and heat emission play an extremely important role.