Difference between quicksave and save

[linuxgurugamer]

I am using the event:  

            GameEvents.onGameStateSaved.Add(OnSave);

what I'm finding is that the save that's done when changing scenes is triggering this as well as quicksaves.

Is there any way to tell if this was the result of a quicksave or scene change?

[linuxgurugamer]

For now I'm checking the datetime stamp on the persistent.sfs file, if it is <1 second old, I'll assume the event was a full save such as what happens when you change scenes.  Seems to work, but wondering if there is a better way.