I have the G930 so I really couldn't care less, I just thought I would bring it up.
As far as the differences, the G930's equalizer and channel settings are all set within the software. The F540 wirelessly connects to a splitter type box which then connects to the systems. Since their isn't a power button on the F540 (If it is on the headset it isn't in the same place as the G930) I have a feeling it's controlled by that splitter box. I would assume you can take the dongle that plugs into the box and connect it directly to your computer, but it's probably going to be a **** shoot as to whether or not you can get it to work and how much control you'll have over the headset.